Greenhouse Seed
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288 products
288 products
Note: Alexandria F1 is being discontinued. Alternative: Cecilia F1.
Overview
Alexandria F1 is a summer butterhead lettuce for indoor cultivation with good size, strong tipburn and bolting resistance, and easy cutting. Suitable for NFT, soil-grown, and floating production systems, Alexandria is a reliable long-day variety for greenhouse growers.
Key Performance Characteristics
- Type: Butterhead
- Day length: Long-day variety
- Tipburn resistance: Very strong
- Bolting resistance: Very strong
- Harvest: Very easy to cut
- Production systems: NFT, soil, floating
- Plant frame: Smaller — supports higher plant populations vs. field varieties
Seed Specifications
- Seed treatment: Pelleted, untreated as standard
- Packaging: Available in 100, 250, 1,000, 5,000 and 25,000 seed packs
Overview
Granadero F1 is an intermediate plum/roma tomato with a compact, vigorous plant for open field or unheated greenhouse production. Tolerant to cooler conditions and producing a high yield of large fruit, Granadero is a reliable choice for growers seeking a productive, adaptable roma variety.
Key Performance Characteristics
- Type: Roma / Plum
- Fruit weight: ~150g (5 oz) average
- Fruit color: Red
- Maturity: Medium to early
- Yield: High yield of large fruits
- Plant habit: Compact, vigorous, indeterminate
- Cool tolerance: Good
- Production systems: Open field and unheated greenhouse
Disease Resistance
- HR: ToMV:0-2 / Lt / Va:0 / Vd:0 / Fol:0,1
- IR: TSWV / Ma / Mi / Mj
Seed Specifications
- Seed treatment: Untreated as standard
- Packaging: Available in 50, 100, 1,000 and 5,000 seed packs
Also consider Shanty F1 (TY) and Alvaro F1 (TY) for TYLCV-resistant roma options.
Overview
Casey F1 is a fresh, medium-green butterhead lettuce bred for indoor long-day production. Medium-fast to maturity, Casey yields jumbo-sized heads with excellent weight, a flat clean closed base, and a full disease resistance package. Strong roots and good heat tolerance make it a particularly strong choice for summer greenhouse production.
Key Performance Characteristics
- Type: Butterhead / Hydroponic Green Butterhead
- Color: Fresh medium green
- Head size: Jumbo — excellent weight
- Base: Flat, clean, closed
- Maturity: Medium-fast
- Day length: Long-day variety
- Heat tolerance: Good — strong summer performer
- Root system: Strong
- Production systems: Heated greenhouse, hydroponic
Disease Resistance
- HR: Bremia Bl-EU:16–37 / Bl-US:1–9 / Nr:0 / Pb
Seed Specifications
- Seed treatment: Pelleted, untreated as standard
- Packaging: Available in 100, 250, 1,000, 5,000, 10,000, 25,000, 50,000 and 100,000+ seed packs
Also consider Frank F1 and Charles F1 butterhead varieties.
Overview
Jawell F1 is one of the most popular mini cucumber varieties in the Paramount Seeds range. With excellent fruit quality, easy harvest, and year-round production capability, Jawell is a proven performer for greenhouse and hydroponic growers. This listing is for fungicide treated seed.
Key Performance Characteristics
- Fruit length: 14–16 cm (5.5–6.3 inches)
- Plant habit: Medium vigor, open plant with short internodes
- Harvest: Fruits can be harvested with or without stems
- Fruit quality: Excellent taste, good shelf life
- Production: Year-round; recommended planting window January–September
- Disease resistance: Intermediate resistance to Powdery Mildew
- Packaging appeal: Versatile for creative retail packaging options
Seed Specifications
- Seed treatment: Fungicide treated as standard
- Packaging: Available in 25, 50, 100, 1,000 and 5,000 seed packs
Also available as Jawell Untreated Seed. Also consider Splash F1 and Ministars F1 mini cucumber varieties.
Overview
Sakura F1 is a versatile, all-around cherry tomato producing beautiful mid-sized round fruit with excellent flavor, crack tolerance, and well-attached sepals. With trusses of 20 or more fruit and strong adaptability across production systems, Sakura is a very tasty and productive variety for greenhouse, high tunnel, and open field growers.
Key Performance Characteristics
- Fruit weight: 15–20g (0.5–0.8 oz) average
- Fruit shape: Round
- Flavor: Very tasty
- Crack tolerance: Good
- Sepals: Well attached
- Truss size: 20+ fruit per truss
- Yield: Very productive
- Production systems: Unheated greenhouse, high tunnel, open field
Seed Specifications
- Seed treatment: Untreated as standard
- Packaging: Available in 25, 50, 100, 1,000 and 5,000 seed packs
Also consider Favorita F1 and Dasher F1 cherry tomato alternatives.
Overview
Charles F1 is a large-framed, long-day butterhead lettuce for late spring, summer, and early fall cultivation. Widely adapted and an excellent choice for greenhouse production, Charles is a medium-sized, thick-leaved variety with attractive color, slow bolting, and strong tipburn resistance — performing well across many locations and growing methods.
Key Performance Characteristics
- Type: Butterhead
- Frame: Large
- Leaf thickness: Medium, thick
- Color: Attractive
- Day length: Long-day variety
- Bolting: Slow bolting
- Tipburn resistance: Strong
- Seasons: Late spring, summer, early fall
- Production systems: Greenhouse, widely adaptable
- Plant frame: Smaller than field varieties — supports higher plant populations
Disease Resistance
- HR: Bremia Bl:1, 3–10, 14–22
Seed Specifications
- Seed treatment: Pelleted, untreated as standard
- Packaging: Available in 100, 250, 1,000, 5,000, 25,000 and 50,000 seed packs
Also consider Frank F1 and Cecilia F1 butterhead alternatives.
Soltero is a great looking lollo rossa type with a good red color.
Suitable for indoor and outdoor production. Resistant to Bremia BL 1-25.
Unlike field varieties that are widely sold for use in greenhouse, these varieties are smaller framed allowing for higher plant populations with exceptional rates of growth that mean plants reach maturity much more quickly.
Pelleted Seed
Lettuce seed from this supplier is untreated as standard.
Overview
Monte Carlo F1 is a very attractive, dark green romaine with fast growth, excellent weight, and good shelf life. Suitable for harvest as a mini head or at full maturity (~55 days), Monte Carlo grows well in high tunnels across all seasons and performs equally well in hydroponic and outdoor production.
Key Performance Characteristics
- Type: Romaine (mini or full head)
- Color: Very attractive dark green
- Frame: Small, fast growing — excellent weight for size
- Shelf life: Good
- Maturity: ~55 days
- Harvest flexibility: Mini head or full maturity
- Production systems: Hydroponic, outdoor, high tunnel (all seasons)
- Downy mildew resistance: Excellent
Seed Specifications
- Seed treatment: Pelleted, untreated as standard
- Packaging: Available in 250, 1,000, 5,000, 50,000 and 100,000 seed packs
Also consider Elizium F1 and Gladius F1 romaine alternatives.
Overview
Crispenza F1 is a fast-growing multileaf lettuce with a crispy texture, juicy bite, and full Bremia resistance. Exceptionally well-suited to greenhouse and vertical production systems, Crispenza combines high yield potential with strong tipburn resistance and slow bolting — making it a reliable performer across winter, spring, and fall crop cycles.
Key Performance Characteristics
- Texture: Crispy, juicy — excellent eating quality
- Growth rate: Very fast growing
- Tipburn resistance: Strong
- Bolting: Slow to bolt
- Seasons: Winter, spring, and fall
- Production systems: Greenhouse, vertical farming, hydroponic
Disease Resistance
- HR: Bremia BL:16–36 / 1–9US / Nr:0 / TBSV
Seed Specifications
- Seed treatment: Pelleted, untreated as standard
- Packaging: Available in 100, 1,000, 5,000, 10,000, 50,000 and 100,000+ seed packs
Overview
Solid Heart F1 is a romaine variety with Tomato Bushy Stunt Virus resistance, Corky Root Rot tolerance, and very high tolerance to Tipburn and Fringe-Burn. With excellent bolting tolerance under extremely high temperatures, Solid Heart can be harvested as a mini head or at full maturity (~75 days) — maturing 2–3 days later than Solid King.
Key Performance Characteristics
- Type: Romaine (mini or full head)
- Maturity: ~75 days (2–3 days later than Solid King)
- Harvest flexibility: Mini head or full maturity
- Recommended spacing: 10–12 inches
- Tipburn tolerance: Very high
- Fringe-burn tolerance: Very high
- Bolting tolerance: Excellent — even under extremely high temperatures
- Corky Root Rot: Tolerant
- TBSV: Resistant
Seed Specifications
- Seed treatment: Pelleted, untreated as standard
- Packaging: Available in 250, 1,000, 5,000, 25,000 and 50,000 seed packs
Also consider Solid King F1 (matures 2–3 days earlier) and Elizium F1 romaine alternatives.
