June–July for many autumn typesSow thinly in modules and follow the specific cultivar period.
- Germination and temperature
- Allow even germination; avoid cold stress during early propagation.
- After emergence
- Keep emerged lettuce bright and well ventilated; prevent high greenhouse temperatures and drying out.
- Pricking out and potting on
- Sow in modules or prick out manageable seedlings into individual cells. Keep the root ball intact when planting out.
- Hardening off and planting out
- Gradually acclimatise indoor-raised plants to sun, wind and outdoor temperatures; shelter them again on cold nights. Plant out sturdy young plants; keep the growing point clear and protect against slugs and snails.
These types have different cultivar windows. Early cold can encourage bolting; summer sowing is the usual route for many autumn types.
Sources and use
RHS · cichorei ↗Britse teeltrichtlijn voor een gematigd klimaat; de genoemde perioden zijn richtlijnen voor Nederland en Vlaanderen.
Royal Horticultural Society · Andijvie kweken ↗Soort- of productgebonden bron; buitenlandse perioden zijn geen vaste Nederlandse zaaidatum.
Feggies · Krulandijvie uit Ruffec zaden biologisch ↗Nederlandse producent of teeltbron; de rasinstructie blijft leidend.
Guideline periods for the Netherlands and Flanders. Check the variety, available light, soil and measured temperatures. Greenhouse heating does not guarantee enough winter light.