WHEN TO SOW
April and May.
Where to Sow
Sow seeds thinly in a well prepared seed bed in shallow drills 1.5cm (1/2") deep in short rows. Alternatively sow the seeds thinly in seeds trays or two seeds per cell in modules under glass at 13°C.
What to do Next
Outdoor sowings should be thinned out to 7-10cm (3-4in) apart , then once plants are large enough , lifted and transplated to their final planting positions 60cm (24in) apart and 90cm (36in) between the rows to grow on to maturity. As soon as glasshouse seedlings show their first pair of leaves, prick off into trays 5cm (2") apart or thin modules to one seedling per cell. Gradually harden off before planting out when about 15cm (6") tall to the same spacings as detailed above.
July to October
Once the main head has been harvested, the plant will produce small heads over the following weeks.
Vitamins A, C and a good source of Iron