SEASONAL CALENDAR
Seasonal Planting Calendar
Indicative sowing, transplant and harvest windows for commercial seed programmes — by hemisphere, production system and climate zone. Always validate against local agronomy: microclimate, irrigation, variety vigour and market timing all matter. SeedMatchGroup advisors fine-tune the calendar to your programme.
Reference timing only — for planning, not agronomic prescription.
| Crop | N. Hemisphere — Greenhouse | N. Hemisphere — Open Field | S. Hemisphere — Greenhouse | S. Hemisphere — Open Field | Arid / Gulf |
|---|---|---|---|---|---|
| Tomato (greenhouse F1) | Aug–Oct sow → Sep–Jul harvest | Feb–Apr sow → Jul–Oct harvest | Feb–Apr sow → Mar–Jan harvest | Aug–Oct sow → Jan–Apr harvest | Sep–Nov sow (cool season) |
| Cucumber (parthenocarpic) | Year-round, 3 cycles | Apr–Jun sow → Jul–Sep harvest | Year-round, 3 cycles | Oct–Dec sow → Jan–Mar harvest | Oct–Mar (cool months) |
| Pepper (blocky bell) | Jul–Sep sow → Nov–Jul harvest | Mar–May sow → Aug–Oct harvest | Jan–Mar sow → May–Jan harvest | Sep–Nov sow → Jan–Apr harvest | Sep–Nov sow (cool season) |
| Watermelon | Feb–Mar sow → Jun–Aug harvest | Mar–May sow → Jul–Sep harvest | Aug–Sep sow → Dec–Feb harvest | Sep–Nov sow → Jan–Mar harvest | Sep–Nov sow (cool season harvest) |
| Melon (Galia / Charentais) | Feb–Mar sow → Jun–Aug harvest | Apr–Jun sow → Jul–Sep harvest | Aug–Sep sow → Dec–Feb harvest | Oct–Dec sow → Jan–Mar harvest | Sep–Nov sow |
| Lettuce (iceberg / romaine) | Sep–Mar (cool indoor) | Feb–Apr & Aug–Oct sow | Mar–Sep (cool indoor) | Aug–Oct & Feb–Apr sow | Oct–Feb sow |
| Onion (long-day storage) | — | Feb–Apr sow → Aug–Sep harvest | — | Aug–Oct sow → Feb–Mar harvest | Oct–Dec sow (short-day types) |
| Sweet corn F1 | — | Apr–Jul sow → Jul–Oct harvest | — | Oct–Jan sow → Jan–Apr harvest | Sep–Nov sow |
| Alfalfa (perennial) | — | Mar–May or Aug–Sep seeding | — | Sep–Nov or Feb–Mar seeding | Oct–Dec seeding |