How to Sow
Because the small seeds have to be sown quite shallowly, it will be easier to keep seeds moist during germination if sown in trays. Alternatively, sow a few seeds in planting stations at the correct spacing and thin after germination. Sprinkle a little loose soil over the seeds till they are no longer visible and keep moist.
How to Harvest
As soon as the outer leaves reach a good size, you can begin cutting them for use. Pick during the coolest times of the day for best crunchiness. If you harvest a whole head, leave about 3cm of stem it may resprout.