Seed Germination Times by Category: A Grower's Reference Guide
by Paramount Seeds on Aug 10 2026
Knowing when to expect germination is one of the most practical tools a grower can have. Whether you’re scheduling transplant dates, planning propagation trays, or troubleshooting slow emergence, this guide gives you approximate germination windows for every major crop category we carry at Paramount Seeds.
Conditions assumed: Optimal germination temperatures, adequate moisture, and appropriate media (rockwool, peat plugs, or coco coir). Pelleted seeds may germinate slightly slower than raw seed due to the coating — ensure the pellet is fully moistened before expecting emergence. See our guide on treated vs. untreated seeds for more on how seed treatment affects germination.
Disclaimer: Germination times listed in this guide are approximate and based on optimal growing conditions. Actual results may vary depending on seed lot, temperature consistency, moisture levels, growing media, and seed treatment (treated vs. untreated). This information is provided as a general reference only. Paramount Seeds makes no guarantee of specific germination rates or timing. For crop-specific technical support, please contact us directly.
🍅 Tomatoes
Includes beefsteak, truss, cherry, cocktail, and grape, roma, and heirloom types. Also includes tomato rootstock varieties (Maxifort, Estamino, Multifort, Beaufort, Kaiser, DR0141TX) — see our rootstock comparison guide for variety selection help. For tomato-specific germination tips, see our tomato germination guide.
| Type | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Beefsteak (e.g. Geronimo, DRTH5075, Rebelski) | 22–26°C | 5–7 days |
| Truss (e.g. Komeett, Grandice Res, Big Sacher) | 22–26°C | 5–7 days |
| Cherry (e.g. Favorita, Camelia, Sun Gold) | 22–26°C | 5–7 days |
| Cocktail (e.g. Mai Tai, Zebrino) | 22–26°C | 5–7 days |
| Grape (e.g. Garincha, Kali, Response) | 22–26°C | 5–7 days |
| Roma (e.g. Granadero, Prunus, Alvaro) | 22–26°C | 5–7 days |
| Heirloom types (e.g. Cherokee Purple) | 22–25°C | 7–10 days |
| Tomato Rootstock (pelleted) | 22–26°C | 6–9 days |
| Tomato Rootstock (non-pelleted) | 22–26°C | 5–7 days |
🥒 Cucumbers
Includes long Dutch, mini and baby, slicer, and pickling types. For detailed cucumber germination best practices, see our cucumber germination guide.
| Type | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Long Dutch (e.g. Bologna, Addison, Kalunga) | 24–28°C | 3–5 days |
| Mini / Baby (e.g. Socrates, Jawell, Parakeet) | 24–28°C | 3–5 days |
| Slicer (e.g. Corinto, Modan, Khassib) | 24–28°C | 3–5 days |
| Pickling (e.g. Excelsior) | 24–28°C | 3–5 days |
| Asian (e.g. Wokcue) | 24–28°C | 3–5 days |
�𣏕 Peppers
Includes bell peppers (red, yellow, orange, purple), mini peppers, jalapeños, habaneros and hot peppers.
| Type | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Bell Pepper — Red (e.g. Dexter, Zamboni, Sprinter) | 24–28°C | 7–10 days |
| Bell Pepper — Yellow (e.g. Bachata, Abay, Berkeley) | 24–28°C | 7–10 days |
| Bell Pepper — Orange (e.g. Sympathy, Arancia, Magno) | 24–28°C | 7–10 days |
| Bell Pepper — Purple/Specialty (e.g. Tequila) | 24–28°C | 7–10 days |
| Mini Pepper (e.g. Tinkerbell, Lunchbox, Triyello) | 24–28°C | 7–10 days |
| Jalapeño (e.g. Teniente) | 24–28°C | 7–12 days |
| Habanero (e.g. Helios) | 26–30°C | 10–14 days |
| Hot Pepper (e.g. Pietro) | 24–28°C | 8–12 days |
🥬 Lettuce
All types are pelleted seed unless noted. Includes butterhead, romaine, multileaf, oakleaf, lollo, crystal, and mini lettuce.
| Type | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Butterhead (e.g. Rex, Frank, Alexandria, Neil) | 15–20°C | 2–4 days |
| Romaine (e.g. Sparx, Thumper, Amadeus) | 15–20°C | 2–4 days |
| Multileaf (e.g. Multigreen, Multired, Multiblond) | 15–20°C | 2–4 days |
| Oakleaf (e.g. Bughatti, Cedar, Navara, Rouxai) | 15–20°C | 2–4 days |
| Lollo Bionda / Lollo Rossa (e.g. Locarno, Revolution) | 15–20°C | 2–4 days |
| Crystal / Hydro types (e.g. Lalique, Dunand, Scamander) | 15–20°C | 2–4 days |
| Mini Lettuce (e.g. Dragoon, Breen, Truchas) | 15–20°C | 2–4 days |
| Iceberg (e.g. Corvinas) | 15–18°C | 3–5 days |
| Raw / Non-pelleted (e.g. Tango, Spicy Mix) | 15–20°C | 2–3 days |
Note: Lettuce germination is inhibited above 25°C (thermodormancy). For summer propagation, pre-chill seeds or germinate in a cooled environment. Also see our guide on managing lettuce quality in warm conditions.
🌿 Herbs & Greens
For basil-specific production guidance, see our greenhouse basil production guide.
| Crop | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Basil (e.g. Genovese, Nufar, Emily, Elidia, Dark Opal) | 20–25°C | 5–7 days |
| Coriander / Cilantro | 18–22°C | 7–10 days |
| Parsley (Plain, Italian, Triple Curled) | 18–22°C | 14–21 days |
| Dill (Bouquet) | 15–22°C | 7–14 days |
| Chives (Standard, Garlic) | 15–20°C | 10–14 days |
| Chervil | 15–18°C | 7–14 days |
| Fennel | 18–22°C | 7–14 days |
🥦 Brassicas & Leafy Greens
| Crop | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Kale (Lacinato, Red Russian, Winterbor, Vates) | 15–22°C | 4–7 days |
| Broccoli (Waltham 29, De Cicco, Green Magic) | 15–22°C | 4–7 days |
| Cabbage (Pak Choi, Red Acre) | 15–22°C | 4–7 days |
| Arugula (Eruca Sativa, Wild / Diplotaxis) | 15–20°C | 3–5 days |
| Spinach (Bloomsdale, Kookaburra, Sunangel) | 10–18°C | 5–10 days |
| Chard (Ruby Red, Fordhook, Rainbow) | 15–22°C | 5–7 days |
| Mustard (Tatsoi, Mizuna, Miz America, Wasabi) | 15–20°C | 3–5 days |
| Collard Greens | 15–22°C | 4–7 days |
| Kohlrabi (Purple Vienna) | 15–22°C | 4–7 days |
| Cress (Upland) | 15–20°C | 3–5 days |
🥕 Root Vegetables
| Crop | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Carrot (Napoli F1 — pelleted & non-pelleted) | 15–22°C | 10–14 days |
| Radish (China Rose, Sango, French Breakfast, Daikon) | 15–20°C | 3–5 days |
| Beet (Bulls Blood) | 15–22°C | 5–10 days |
🌽 Cucurbits (Squash & Melon)
| Crop | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Squash (Yellowfin, Mexicana, Green Machine, Kopana, Grackle, Golden Glory, Dunja) | 24–28°C | 4–7 days |
| Cantaloupe Melon (Tirreno F1) | 24–28°C | 4–7 days |
| Watermelon (Virgo F1) | 25–30°C | 5–8 days |
🌴 Papaya
Papaya seeds require warm temperatures and benefit from pre-soaking for 12–24 hours before sowing. For full production guidance, see our papaya production guide. Browse all papaya varieties →
| Variety | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Tainung #1 & #2 | 25–30°C | 10–14 days |
| Red Lady 786 | 25–30°C | 10–14 days |
| Red Maradol / Improved Red Maradol | 25–30°C | 10–14 days |
| Solo Sunrise / Improved Solo Sunrise / Golden Solo Sunrise | 25–30°C | 10–14 days |
| Taiwan Solo Sunrise | 25–30°C | 10–14 days |
| Bella F1 | 25–30°C | 10–14 days |
| Red Nemesis F1 | 25–30°C | 10–14 days |
| Linda F1 | 25–30°C | 10–14 days |
| Waimanolo X77 | 25–30°C | 10–14 days |
| Red Matador | 25–30°C | 10–14 days |
🌻 Sunflowers & Other
| Crop | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Sunflower (Dorit F1, Grey Stripe, Black Oil) | 20–25°C | 5–10 days |
| Nasturtium (Tropaeolum majus) | 18–22°C | 7–14 days |
| Okra (Clemson Spineless) | 24–30°C | 7–14 days |
| Eggplant (Taurus, Jaylo, Angela) | 24–28°C | 7–14 days |
| Leek (American Flag) | 15–20°C | 10–14 days |
| Onion (Sivan) | 15–20°C | 10–14 days |
�ae˜ Legumes
| Crop | Optimal Temp (°C) | Germination Time |
|---|---|---|
| Pole Bean (Seychelles, standard) | 20–25°C | 5–8 days |
| Bush Bean (Blue Lake 274) | 20–25°C | 5–8 days |
| Haricot Vert (Maxibel) | 20–25°C | 5–8 days |
| Snap Pea (Cascadia) | 10–18°C | 6–10 days |
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