Sow direct into finely prepared soil that has been lightly watered. Sow thinly in a seed bed, 5mm (1/4in) deep, firm gently and keep moist. Seedlings appear in 14-21 days.
Thin out to 20cm (8in) apart when large enough to handle. Once plants have developed good sized heads, trim off the top of the plant, leaving approx 2.5cm (1in) above ground. Cover the stump with a bucket that blocks out all light. Harvest: 8-10 weeks from sowing when the heads are approx 20cm (8in) tall. You can get 2 or 3 heads per plant per season.