Product Highlight

A concise side-by-side comparison of all Paramount Seeds papaya varieties by fruit size, flesh color, PRSV tolerance, harvest time, and shipping suitability.

Successful greenhouse lettuce programs rarely rely on a single variety. The most productive operations pair complementary types — covering different head structures, harvest models, and market segments. Here's how to think about building your mix, based on what works in commercial greenhouse production. Why Pair Varieties? Different lettuce types serve different markets, harvest cycles, and buyer preferences. A well-paired program reduces your exposure to demand shifts in any one category, improves visual variety for retail and foodservice buyers, and gives you flexibility across production cycles. The most effective pairings tend to combine varieties by head type — not just by variety name. Proven Variety Pairings for Greenhouse Production Butterhead + Batavia (Greenleaf) A classic combination that covers two of the most in-demand head types. Butterhead varieties like Rex F1 and Frank F1 deliver consistent heading, excellent shelf life, and strong tipburn tolerance — ideal for clamshell retail. Paired with a batavia like Muir Greenleaf, you add an open-leaf structure with a crunchier texture that appeals to loose-leaf and salad mix buyers. 👉 Shop Rex F1 Butterhead Lettuce | Shop Muir Greenleaf Lettuce (Batavia) 📖 Rex F1 Butterhead — The Industry Standard for Greenhouse & Hydroponic Production Butterhead + Romaine Two dominant head-lettuce categories with minimal overlap in the market. Rex F1 Butterhead paired with Tacitus F1 Romaine gives growers coverage across grocery retail and CSA boxes where variety is expected. Fairly F1 Butterhead and Elizium F1 Romaine is another strong combination — the softer butterhead texture contrasts well with Elizium's upright, disease-resistant romaine heads. 👉 Shop Elizium F1 Romaine Lettuce | Shop Rex F1 Butterhead Lettuce | Shop Fairly F1 Butterhead Lettuce 📖 Tacitus F1 Romaine — Tipburn Resistance Meets Dark Green Elegance Oakleaf + Batavia + Romaine (Full-Spectrum Program) For operations running multipack or mixed-head programs, a three-variety combination covering oakleaf, batavia, and romaine delivers the broadest market coverage. Rouxai F1 Oakleaf brings visual appeal and a distinctive leaf shape; Muir Greenleaf adds batavia crunch; Tacitus F1 Romaine provides the dark green, upright heads that perform in both retail and foodservice. 👉 Shop Rouxai F1 Oakleaf Lettuce | Shop Muir Greenleaf Lettuce (Batavia) | Shop Tacitus F1 Romaine Lettuce 📖 Red & Green Pairing Chart for Multipacks Multileaf + Midi Romaine Multileaf varieties are increasingly popular for cut-and-come-again and living lettuce production. Pairing a multileaf like Crispenza F1 with a compact romaine like Cobain F1 Midi Romaine gives growers flexibility across harvest cycles — running both full-head and living lettuce programs from the same greenhouse. 👉 Shop Cospenza F1 Multileaf Lettuce | Shop Cristabel F1 Multileaf Lettuce 📖 Multileaf Lettuce — The Grower's Guide to Varieties from Paramount Seeds How to Build Your Program Start with two head types. Butterhead + romaine or butterhead + batavia are the most versatile starting points. They serve different buyer segments without competing for the same shelf position. Add a specialty type for flexibility. Oakleaf, multileaf, or crystal varieties support different harvest models and add visual differentiation for retail. They're a natural third SKU once your core program is established. Balance red and green. If you're supplying retail multipacks, color balance matters as much as variety. Our Red & Green Pairing Chart is the best reference for building a visually market-ready mix. Browse the Full Lettuce Catalog 👉 Shop All Lettuce Varieties — pelleted, non-pelleted, butterhead, romaine, multileaf, crystal, oakleaf, and more. 📖 Related reading: Which Romaine Lettuce Should I Use for Greenhouse Production? Crystal Lettuce Varieties: How To Choose? Non-Pelleted Lettuce Varieties for Microgreens and Baby Leaf Production Looking To Grow a Red Lettuce Variety? A Hydroponic Grower's Guide Pythium Prevention in Hydroponic Lettuce Pairing Summary Pairing Best For Key Varieties Butterhead + Batavia Clamshell retail + loose-leaf/salad mix Rex F1, Frank F1 + Muir Greenleaf Butterhead + Romaine Grocery retail, CSA boxes Rex F1 + Tacitus F1, Fairly F1 + Elizium F1 Oakleaf + Batavia + Romaine Multipack & mixed-head programs Rouxai F1 + Muir Greenleaf + Tacitus F1 Multileaf + Midi Romaine Cut-and-come-again, living lettuce Cospenza F1 + Cristabel F1

Corinto F1 slicer cucumber from Enza Zaden delivers high yields of uniform, dark green 8–10 in. fruits with strong resistance to CMV, CVYV, and Powdery Mildew — suited for greenhouse and open-field autumn and spring production.

Rex F1 butterhead lettuce from Rijk Zwaan is the industry benchmark for greenhouse and hydroponic production — slow-bolting, tipburn-resistant, and available as pelleted untreated seed in sizes from 100 to 100,000 seeds.

Bergam's Green is one of the most reliable greenleaf lettuces for outdoor and hydroponic production — large frame, dark green, tipburn-resistant, and available in both pelleted and non-pelleted seed forms.

Red Lady 786 F1 is one of the most widely grown commercial papaya varieties in the world — and for good reason. Developed in Taiwan, it combines reliable fruit set, strong yields, and good disease tolerance in a compact, manageable plant. Here's what growers need to know. Variety Overview Red Lady 786 F1 Papaya Seed is a hybrid papaya variety producing red-fleshed fruit with excellent sweetness and commercial appeal. It is one of the most recognized papaya varieties globally, particularly in tropical and subtropical growing regions. For a broader look at papaya production and variety selection, see our Papaya Production: A Grower's Guide to Varieties, Cultivation, and Harvest. Buy Red Lady 786 F1 Papaya Seed → Key Performance Characteristics Fruit size: Averaging 1.5 to 2.0 kg per fruit — a commercially preferred size for retail and export markets. Fruit set height: Sets fruit at an average of 70 cm above soil, keeping the harvest zone accessible and reducing labor costs. Understanding papaya sex ratios is important for maximizing fruit set in your planting. Time to first harvest: Produces fruit on average nine months from seed — a relatively fast production cycle for papaya. Yield: Trees produce approximately 35 fruits per season. Note that first-year production is typically larger than second-year production. Flesh color: Deep red — high visual appeal for fresh market and foodservice. Sweetness: Good Brix levels; well suited to fresh consumption and premium retail. Shipping: Fruit ships well, making it a strong choice for growers supplying regional or export markets. Disease Tolerance Red Lady 786 F1 carries tolerance to Papaya Ring Spot Virus (PRSV) — one of the most damaging diseases in commercial papaya production. This tolerance is a key reason for its widespread adoption in tropical growing regions where PRSV pressure is high. Note: This variety has been observed to be less resistant to fungal diseases compared to Certified Red Maradol. Growers in high-humidity environments should maintain a proactive fungicide program and ensure good airflow around plants. Seed Specifications Origin: Taiwan Seed treatment: Untreated (standard) Approximate seed count: ~480 seeds per 10g pack (±48,000 seeds/kg). Seed count may vary 10–20% depending on seed lot and production year. Minimum germination: 75% All papaya seed orders are final — non-returnable and non-refundable. Complementary Variety Looking for an alternative with similar red-fleshed fruit characteristics? Consider Red Nemesis F1 — read our Red Nemesis F1 variety spotlight for a detailed comparison of its performance characteristics. You can also compare the full range in our papaya varieties guide. Further Reading Papaya Production: A Grower's Guide to Varieties, Cultivation, and Harvest Papaya Sex Ratios: Male, Female, and Hermaphrodite Plants Explained What Is Brix? Understanding Sugar Content and Fruit Quality Treated vs. Untreated Seeds: Which Should You Choose? Ready to Order? Order Red Lady 786 F1 Papaya Seed → Browse All Papaya Varieties →   Contact Our Team → Disclaimer: This article is for general informational purposes only. Variety performance may vary depending on growing environment, climate, soil conditions, and local disease pressure. Always consult a local agronomist or extension specialist for production recommendations specific to your region.

Kale is an extremely popular crop choice. Whether you're growing full heads, baby leaf, or microgreens, the right variety makes a significant difference in yield, color, flavor, and market appeal. Here's our breakdown of the kale varieties available from Paramount Seeds. Shop All Kale Varieties → Lacinato (Dinosaur) Kale Lacinato Dinosaur Kale — Shop NowThe classic Italian heirloom kale with dark blue-green, pebbled leaves and a rich, earthy flavor. Lacinato — also known as Tuscan or Dinosaur kale — is a premium variety with strong demand from chefs, specialty retailers, and farmers markets. Its distinctive leaf texture and deep color make it a standout in any produce display. Red Russian Kale Red Russian Kale — Shop NowA flat-leaved kale with distinctive purple-red stems and a tender, mild flavor — one of the most popular kale varieties for baby leaf and microgreen production. Red Russian is fast-growing, early to harvest, and produces attractive, deeply lobed leaves with excellent color contrast. A staple in premium baby leaf mixes and a farmers market favorite. For more on non-pelleted seed options suited to baby leaf and microgreen programs, see our non-pelleted variety guide. Vates Blue Curled Kale Kale — Vates (Blue Curled) — Shop NowA compact, tightly curled blue-green kale with excellent cold hardiness and a long harvest window. Vates is a reliable open-pollinated variety well suited to fall and winter greenhouse production, with good uniformity and strong yield. A practical choice for growers who need a dependable curled kale without the cost of F1 hybrid seed. Winterbor F1 Kale — Winterbor F1 — Shop NowA vigorous F1 hybrid, tightly curled blue-green kale with excellent cold tolerance and strong yield. Winterbor F1 is the standard for fresh-cut and bunched kale production, with a long harvest window and outstanding shelf life. Its uniform, upright habit makes it well suited to both field and greenhouse production. A top choice for growers supplying retail and foodservice markets year-round. Choosing the Right Kale Variety Type Best For Lacinato Dinosaur Flat, dark blue-green Chefs, specialty retail, farmers markets Red Russian Flat, purple-red stems Baby leaf, microgreens, farmers markets Vates Blue Curled Curled, blue-green (OP) Fall/winter greenhouse, OP alternative to Winterbor Winterbor F1 Curled, blue-green (F1) Retail bunches, fresh-cut, year-round greenhouse Production Tips Kale seed from Paramount Seeds is supplied untreated as standard unless otherwise noted. For microgreen and baby leaf production, substrate choice matters — see our greenhouse growing media comparison for guidance on rockwool, coco coir, and peat options suited to high-density seeding. Ready to Order? Browse our kale variety collection or contact us to get help selecting the right varieties for you.

Non-pelleted seed is the go-to choice for microgreen and baby leaf production. The smaller, natural seed size allows for high-density seeding, faster germination, and more uniform coverage across trays and channels. Here's our breakdown of the best non-pelleted lettuce varieties available from Paramount Seeds for these high-turnover formats. New to lettuce production? See our guide to choosing your first lettuce varieties. Shop Baby Leaf & Microgreen Varieties → Why Non-Pelleted Seed for Microgreens and Baby Leaf? Pelleted seed is ideal for precision transplanting in full-head hydroponic systems, but for microgreens and baby leaf production, non-pelleted seed offers key advantages. For a full explanation of what pelleting involves, see our guide on how seed is pelleted. Higher seeding density — natural seed size allows tight, even coverage across trays Faster germination — no clay coating to slow moisture uptake Lower cost per tray — non-pelleted seed is typically more economical at scale Better suited to broadcast seeding — ideal for soil trays, foam mats, and burlap systems. See our growing media comparison for substrate options suited to high-density seeding. Tango Green Lettuce Tango Green Lettuce (Non-Pelleted) — Shop Now A classic baby leaf and microgreen variety. Tango Green produces deeply serrated, bright green leaves with excellent texture and visual appeal. Fast-growing and reliable, it's a staple in mixed baby leaf blends and standalone microgreen trays. Its distinctive frilly leaf shape adds visual interest to any mix. Tango Red Lettuce Tango Red Lettuce (Non-Pelleted) — Shop Now The red counterpart to Tango Green, with the same deeply cut leaf shape but rich burgundy-red color. An excellent addition to multicolor baby leaf mixes, providing strong color contrast alongside green varieties. Consistent germination and vigorous early growth make it a reliable choice for high-turnover production. Green Oakleaf Lettuce Green Oakleaf Lettuce (Non-Pelleted) — Shop Now A versatile green oakleaf well suited to both baby leaf and microgreen production. Produces lobed, tender leaves with a mild flavor and attractive shape. A reliable performer in high-density seeding systems, and a natural complement to red varieties in mixed baby leaf blends. Buttercrunch Lettuce Buttercrunch Lettuce (Non-Pelleted) — Shop Now A soft, tender butterhead type well suited to baby leaf harvest at the cotyledon or first true leaf stage. Buttercrunch produces smooth, rounded leaves with a mild, buttery flavor — a favorite for premium baby leaf mixes targeting restaurants and specialty retail. Slow to bolt, giving a wider harvest window. Bergam's Green Leaf Lettuce Bergam's Green Leaf Lettuce (Non-Pelleted) — Shop Now A vigorous green leaf variety with broad, slightly ruffled leaves. Bergam's Green is a strong performer in baby leaf production, offering high yield and good uniformity. Its mild flavor and attractive leaf shape make it a versatile base for mixed baby leaf blends. Freckles Lettuce Freckles Lettuce (Non-Pelleted) — Shop Now A visually distinctive romaine-type with green leaves splashed with red spots — a standout in any baby leaf mix. Freckles adds unique color and pattern variation that commands attention at farmers markets and specialty retail. Good bolt tolerance and reliable germination. Muir Greenleaf Lettuce (Batavia) Muir Greenleaf Lettuce / Batavia (Non-Pelleted) — Shop Now A Batavia-type greenleaf with crisp texture and good heat tolerance. Muir performs well in baby leaf production, offering a slightly more structured leaf than softer butterhead types. Also available in pelleted format for full-head hydroponic production. Good for growers looking to add textural variety to their baby leaf lineup. Sweet Lettuce Mixture Sweet Lettuce Mixture (Raw Seed) — Shop Now A pre-blended mix of mild, sweet lettuce varieties designed for baby leaf and cut-and-come-again production. Ideal for growers targeting restaurants, meal kits, and retail customers who prefer a gentle, crowd-pleasing flavor profile. Broadcast seed directly into trays or channels for a ready-to-harvest blend. Spicy Lettuce Mixture Spicy Lettuce Mixture (Raw Seed) — Shop Now A bold blend of peppery and spicy greens for growers targeting chefs, specialty retailers, and adventurous consumers. Adds heat and complexity to baby leaf mixes and microgreen trays. A strong differentiator at farmers markets and in restaurant supply accounts where flavor variety is valued. Mesclun Gourmet Greens Mix Mesclun Gourmet Greens Mix (Non-Pelleted) — Shop Now A pre-blended mix of complementary greens designed for broadcast seeding and cut-and-come-again baby leaf production. Ideal for growers who want a ready-to-sow blend with built-in color and texture variety. Suited to soil trays, foam mats, and outdoor row production. Choosing the Right Variety for Your Format Variety Best Format Key Attribute Tango Green Microgreens, baby leaf mix Frilly texture, fast growth Tango Red Baby leaf mix, color contrast Deep red, high visual impact Green Oakleaf Baby leaf, microgreens Lobed leaf, mild flavor Buttercrunch Premium baby leaf Mild flavor, tender texture Bergam's Green Baby leaf blend base High yield, good uniformity Freckles Specialty baby leaf, farmers market Unique spotted pattern Muir Greenleaf Baby leaf, textural variety Crisp Batavia texture Sweet Lettuce Mix Baby leaf, cut-and-come-again Mild, crowd-pleasing blend Spicy Lettuce Mix Specialty baby leaf, chefs Bold, peppery flavor blend Mesclun Mix Broadcast seeding, cut-and-come-again Ready-to-sow gourmet blend Ready to Order? Browse our full Baby Leaf & Microgreen Varieties collection or contact us to get help selecting the right varieties for your operation.

Red lettuce is a visually striking crop in hydroponic greenhouse production. Whether you're growing for retail, foodservice, or farmers markets, the right variety makes all the difference — in color intensity, bolting tolerance, yield, and shelf life. Here's our breakdown of the best red lettuce varieties available from Paramount Seeds, organized by type. New to lettuce production? See our guide to choosing your first lettuce varieties. Shop Red Lettuce Varieties → Why Choose Pelleted Seed for Hydroponic Lettuce? Pelleted seed is the standard for professional hydroponic lettuce production. The uniform coating makes seeding precise and consistent, reduces seed waste, and improves germination rates in rockwool and foam plug systems. All varieties listed below are available in pelleted form. For a full explanation of how pelleting works, see our pelleted seed guide. Red Oakleaf Varieties Bughatti F1 Oakleaf Lettuce — Shop NowA grower favorite. Bughatti is vigorous, fast-growing, and slow to bolt, with a healthy base and strong root system. Its performance in NFT systems is particularly stable and reliable — making it a low-risk, high-reward choice for year-round production. Deep red color with a well-formed head. Rouxai F1 Oakleaf Lettuce — Shop NowIntense cherry-red color on both sides of the leaf — a standout on any retail shelf. Compact, upright habit with year-round suitability in cooler growing environments. Ideal for processing and fresh pack markets. Rutilai F1 Oakleaf Lettuce (RZ 83-80) — Shop NowA red oakleaf with internal green color — slightly faster-growing than full-red types. Good tipburn and bolting tolerance, strong downy mildew resistance, and suitable for year-round production. Also performs outdoors, giving it flexibility across growing systems. Red Butterhead Varieties Gilmore F1 Red Butterhead Lettuce (RZ 42-512) — Shop NowA dark red, large butterhead suited to both heated and unheated greenhouse production. Gilmore has good cover leaves, a long harvest window, and yellow-green internal color with a red leaf base. Strong resistance to bolting, internal tipburn, and Big Vein. Excellent for growers who need scheduling flexibility. For a full explanation of resistance codes, see our disease resistance guide. Red Multileaf (Single-Cut) Varieties Multileaf types — sometimes called Salanova or Artisan types — are harvested with a single cut at the base, making them highly efficient for processing and foodservice. They're gaining rapid popularity at restaurants and farmers markets. For a full overview of the multileaf category, see our multileaf lettuce grower's guide. Rubyglace F1 Multileaf Lettuce — Shop NowVery high plant uniformity with intense dark red color and thick leaves. Exceptionally strong against tipburn and bolting, with a high number of uniform leaves per head. Purpose-built for the sandwich and fresh wrap market, but equally attractive for farmers markets and restaurants. Resistances: Bl: 16-35. Multired 4 F1 Multileaf Lettuce — Shop NowBrilliant red, oak-leaf shaped leaves with an upright plant shape. Thin, smooth leaves and very large leaf size make this a visually impressive product. Good bolting tolerance and a favorite for restaurant and market growers. Best suited for markets where visual impact matters more than pack consistency. Multired 80 F1 Multileaf Lettuce — Shop NowA triple-red multileaf with medium incised curly leaves and strong vigor. Large, open head shape with excellent tipburn tolerance and bolting resistance. The standout choice for multicolor and trio mixes — described as the best red to compete with greens in a mixed pack. See our red/green multipack pairing guide for recommended combinations. Early maturing with high disease resistance (Bl: 16-31). Crystal Lettuce Scamander F1 Crystal Lettuce (RZ CL5001) — Shop NowA unique category in its own right. Scamander is an intense quadruple-red crystal lettuce with crispy, smooth leaves that maintain dark red color even in low light conditions. Designed for high-density cultivation — toddler, teenleaf, and salatrio formats — it's machine harvestable and suited to year-round indoor hydroponic production. Average crop weight 200g, 35–50 day growing cycle. See our crystal lettuce variety guide to compare Scamander against other ice lettuce options. Resistances: Bl:29-40EU, LMV:1, Fol:1. Red Romaine & Little Gem Varieties Intred F1 Romaine Lettuce — Shop NowA red Little Gem type with a unique internal red color — rare in the category. Medium size, good shelf life, and medium bolting tolerance. A farmers market favorite for its color and compact heart shape. Truchas F1 Mini Lettuce — Shop NowStunning contrast between green hearts and dark cherry-red outer leaves. Pairs beautifully with green Little Gem types like Dragoon for a mixed pack. Broad disease resistance including Bl:16-35EU and LMVR. Tupelo F1 Mini Romaine Lettuce — Shop NowA red mini romaine with excellent color intensity and strong tipburn tolerance. Performs well in whole head and high-density controlled environment systems. Resistances: HR Bl:29-36,38-41/7-10US/Nr:0/TBSV; IR Ss/Fol:4. Choosing the Right Variety for Your System Type Best For Top Pick Oakleaf NFT, DWC, raft — year-round Bughatti F1 Butterhead Heated/unheated greenhouse, long harvest window Gilmore F1 Multileaf Foodservice, single-cut processing Rubyglace F1 Multileaf Multicolor/trio mixes Multired 80 F1 Crystal High-density indoor, plant factory Scamander F1 Little Gem / Mini Romaine Farmers markets, retail, mixed packs Truchas F1 Little Gem / Mini Romaine Whole head & high-density controlled environment Tupelo F1 Ready to Order? Browse our full Red Lettuce Varieties collection or contact us if you need help selecting the right variety for your system and market.

Paramount Seeds offers a growing lineup of  tomato varieties with validated multi-gene intermediate resistance to Tomato Brown Rugose Fruit Virus (ToBRFV) — protecting yield, quality, and continuity in commercial greenhouse production.

Choosing the right tomato rootstock is an important decision. The rootstock influences plant vigor, disease resistance, yield potential, and how well your scion variety performs over a long crop cycle. Here's a straightforward comparison of the main rootstock varieties available from Paramount Seeds. For a broader introduction to rootstock selection, see our rootstock selection guide, and our step-by-step grafting guide for growers new to grafting. Shop Tomato Rootstock → At a Glance Variety Vigor Best For Key Strength Maxifort F1 High Long crops, weak/generative scions High vigor Multifort F1 High Soil crops with Fusarium race 3 pressure Fusarium 3 + nematode resistance Estamino F1 High, Generative Growers managing vegetative crops Balanced, generative effect Kaiser F1 Balanced Long cycles, larger fruit size Early, high production DR0141TX F1 High Long crops, versatile scions Highest yield potential in De Ruiter range Variety Profiles Maxifort F1 Maxifort is one of the most vigorous rootstocks commercially available and has long been a go-to for high-wire, long-cycle greenhouse production. It excels on weak or generative scion varieties, boosting plant endurance and yield potential. Suitable for both soil and rockwool systems. Read our Maxifort F1 product spotlight for full details. Note: pelleted seed materials are not suitable for organic production. Best for: Long crops, rockwool and soil, generative or weak scions. Multifort F1 Multifort matches Maxifort in vigor but adds a critical disease package: Fusarium race 3 resistance combined with nematode resistance. This makes it the preferred choice for soil-grown crops where Fusarium 3 is a known risk. Using a strong rootstock like Multifort can extend plant life and increase average fruit weight. See our guide to understanding HR and IR disease resistance for help reading resistance codes. Best for: Soil crops, Fusarium race 3 pressure, long cycles. Estamino F1 Estamino takes a different approach — it's vigorous but with a distinctly generative effect on the grafted scion. Rather than pushing excessive vegetative growth, it promotes a well-balanced plant with steady, consistent production from start to finish. Ideal for growers who struggle to control overly vegetative crops. Broad disease resistance including TSWV and Fusarium 0-2. Best for: Growers managing vegetative growth, long cycles, soil and substrate crops. Kaiser F1 Kaiser offers a balanced, controlled vigor — strong and generative without being excessive. It promotes early, high production and tends to produce larger fruit size, making it well suited to market segments where fruit grade matters. Good plant balance throughout the crop cycle. Best for: Long cycles, larger fruit size, balanced vigor requirements. DR0141TX F1 DR0141TX is De Ruiter's highest yield potential rootstock and is particularly valued for its versatility — it works well with both vegetative and generative scion types. It increases vigor and endurance, making it especially useful for long crops. See our detailed Maxifort vs. DR0141TX comparison to decide which is right for your operation. Seed is untreated, primed, and pelleted. Note: may not be suitable for organic production — verify with your certifier. Best for: Long crops, maximum yield potential, versatile scion compatibility. How to Choose Growing in soil with disease pressure? Multifort (Fusarium 3/nematodes) is your best option. Growing in rockwool or substrate on a long cycle? Maxifort or DR0141TX for maximum yield; Kaiser for balanced vigor and fruit size. Struggling with vegetative, hard-to-control plants? Estamino's generative effect will help bring balance. Need organic-compatible options? Check with your certifier — several pelleted rootstocks use non-organic pellet materials. New to grafting? See our step-by-step tomato grafting guide before your first crop. Need Help Deciding? Browse our full Tomato Rootstock collection or contact our team for variety recommendations tailored to your system. Shop Tomato Rootstock → Disclaimer: Variety performance data and disease resistance ratings are based on breeder specifications and general greenhouse conditions. Results may vary depending on growing environment, local disease pressure, scion variety, and crop management practices. Paramount Seeds makes no warranty, express or implied, regarding the performance of any variety in your specific operation. Always consult with an agronomist or your local extension service for recommendations tailored to your growing conditions. Organic suitability should be verified with your certifying body prior to use.

Crystal lettuce — also known as ice lettuce — has become a very popular addition to our selections for greenhouse and plant factory production. Its jewel-like, translucent leaf cells, crisp texture, and quality make it a premium product for fresh market, foodservice, and processing channels. At Paramount Seeds, we carry four Rijk Zwaan crystal lettuce varieties suited to a range of production systems, light environments, and market destinations. Here's how they compare. The Paramount Seeds Crystal Lettuce Lineup 1. Lalique F1 — The Year-Round Workhorse SKU: RZLALI | Type: Green crystal | System: Hydroponic, indoor & outdoor Lalique F1 is our most versatile crystal lettuce — exceptionally crisp, juicy, and disease-resistant, with reliable performance across seasons. Its untreated, pelleted seed supports consistent germination in both indoor and outdoor setups. Flavor and texture are standout: ideal for premium salads, burgers, and sandwiches where presentation matters. Year-round hydroponic production Strong disease resistance Excellent fresh market and foodservice appeal Shop Lalique F1 → 2. Hydrolique F1 — Built for High-Density & Artificial Light SKU: RZHYDROL | Type: Green crystal | System: Indoor, artificial lighting Hydrolique F1 is engineered for vigorous, high-yield performance under artificial lighting — making it a natural fit for plant factories and year-round indoor operations. It shows strong resistance to glassiness and tipburn, two of the most common quality defects in enclosed lettuce production, and performs well at high planting densities. Optimized for LED and HPS supplemental lighting environments Tipburn and glassiness resistance High-density planting compatible Shop Hydrolique F1 → 3. Scamander F1 — Intense Red, High-Density & Machine-Harvestable SKU: RZSCAMDR | Type: Intense quadruple red crystal | System: Indoor hydroponics, plant factory Scamander F1 is the red crystal specialist in our lineup — delivering intense, dark red color even under low-light conditions. Bred for high-density cultivation (toddler, teenleaf, and salatrio formats), it features smooth, crispy leaves that are easy to handle and machine-harvestable, making it well-suited for processing and fresh market operations at volume. Intense red color stable in low light High-density formats: toddler, teenleaf, salatrio Machine-harvestable 35–50 day crop cycle | ~200 g average head weight Shop Scamander F1 → 4. Sungari F1 — Red Crystal for Seasonal & Plant Factory Production SKU: RZ44CL5535 | Type: Red crystal | System: Hydroponics, plant factory, outdoor Sungari F1 is an attractive red crystal lettuce with broad production flexibility. It performs from September through April under artificial light in standard hydroponic systems, and is suitable year-round in Salatrio format or in plant factories. Outdoor production is also viable from late spring through summer. A compact variety at ~150 g average head weight, Sungari is a strong option for growers who need seasonal flexibility across multiple production environments. Red crystal — attractive color for fresh market Flexible: hydroponics, plant factory, outdoor Year-round in Salatrio and plant factory formats ~150 g average head | ~40 days to maturity Shop Sungari F1 → Quick Comparison: Which Variety Is Right for You? Variety Color Best System Key Strength Lalique F1 Green Hydroponic, indoor/outdoor Year-round versatility & flavor Hydrolique F1 Green Indoor, artificial light Tipburn & glassiness resistance Scamander F1 Intense red Plant factory, processing Machine-harvestable, high-density Sungari F1 Red Hydroponic, plant factory, outdoor Seasonal & system flexibility Need Help Choosing? The right crystal lettuce variety depends on your production system, light environment, target market, and harvest format. If you're running a plant factory or high-density indoor system, Scamander or Hydrolique are strong starting points. For year-round fresh market production with maximum flexibility, Lalique is hard to beat. And for seasonal flexibility across multiple environments, Sungari is worth a trial. For a broader look at lettuce variety selection, see our guide to choosing your first lettuce varieties. You may also find our lettuce disease identification guide and tipburn guide useful for managing crop health across any of these varieties. Browse All Lettuce Varieties →  Contact Our Team →

When selecting a tomato rootstock for grafted production, two names consistently come up in commercial greenhouse operations: Maxifort F1 and DR0141TX F1. Both are De Ruiter selections available in pelleted seed format, but they serve different grower profiles. For a broader overview of all rootstock options, see our full rootstock comparison guide, or our rootstock selection guide. New to grafting? See our step-by-step tomato grafting guide. Shop Tomato Rootstock → Maxifort F1 — The Vigor Standard Maxifort is one of the most vigorous rootstocks available and has been the industry benchmark for long-crop tomato production. It excels in both soil and rockwool systems and is particularly well-suited for weak or generative scions that need a strong root system to reach their yield potential. If you're running a demanding long-season crop and want a rootstock with a proven track record, Maxifort is the reliable choice. Read our Maxifort F1 spotlight for full details. Best for: Long crops, generative or weak scions, soil and rockwool systems.Note: Pelleted seed is not suitable for certified organic production. See our guide on treated vs. untreated seed for more on seed treatment and organic compatibility. Shop Maxifort F1 Pelleted Seed → DR0141TX F1 — The Yield Ceiling DR0141TX is De Ruiter's highest yield-potential rootstock in their current portfolio. It increases vigor and endurance across a wide range of scion types — both vegetative and generative — and is especially valuable for long-season crops where sustained performance matters. It also carries a strong disease resistance package: HR to Fusarium (For), Plasmopara (Pl), and ToMV strains 0–2, with IR to root-knot nematodes (Ma, Mi, Mj). Best for: Maximum yield potential, long crops, nematode pressure, broad scion compatibility.Note: Seed is untreated, primed, and pelleted. Verify organic suitability with your certifier. Shop DR0141TX F1 Pelleted Seed → Side-by-Side Comparison Maxifort F1 (Pelleted) DR0141TX F1 (Pelleted) Vigor Very high High + endurance Yield potential Excellent Highest in De Ruiter lineup Scion compatibility Best on weak/generative Broad (veg & gen) Disease resistance — HR: For, Pl, ToMV 0-2 / IR: Ma, Mi, Mj Systems Soil & rockwool Greenhouse Organic Not suitable Verify with certifier Which Should You Choose? Choose Maxifort if you're working with a generative or weaker scion and want proven, consistent vigor across soil or rockwool systems. Choose DR0141TX if you're pushing for maximum yield, running a long crop under nematode pressure, or want the broadest disease resistance package in the De Ruiter rootstock lineup. Both are available in pelleted seed format in quantities from 100 to 5,000+ seeds. For a full comparison of all rootstock options including Estamino, Kaiser, and Multifort, see our complete rootstock guide.

Tacitus F1 is a medium to large framed romaine lettuce with excellent tipburn resistance and dark green open hearts — suited to field, greenhouse, and hydroponic production in pelleted seed format.

Maxifort F1 is the most popular tomato rootstock in North America — delivering unmatched vigor, extended harvest windows, and broad disease resistance for year-round hydroponic production.

Muir is a medium-sized batavia greenleaf lettuce with upright heads, sweet flavor, and strong resistance to bolting, tipburn, downy mildew, and aphids. Available in pelleted seed format for precision seeding in field and unheated greenhouse production.

DRTH5075 is a DeRuiter® F1 beefsteak tomato featuring multi-gene intermediate resistance to ToBRFV, delivering the uniform round fruits and strong yield potential of Touché with critical disease protection for modern greenhouse production.

Torero F1 is a high-yield red beefsteak tomato from DeRuiter — delivering large fruit, firm texture, ~14-day shelf life, and a broad disease resistance package for long-season greenhouse programs.

Splash F1 is Paramount Seeds' top-recommended mini cucumber for year-round heated greenhouse production — delivering uniform fruit quality, excellent taste, and broad disease resistance across all four crop cycles.

A product spotlight on Red Nemesis F1 Papaya — a semi-dwarf hybrid with deep red flesh, 19–21% TSS sweetness, very high yield potential, and high tolerance to PRSV. A strong alternative to Red Lady 786.