It grows best on soils that retain moisture and are high in organic matter and nutrients.
Light soils are suitable for early crops, whereas heavier soils are preferred for later crops.
Start early transplants in the greenhouse. Set out hardened plants as soon as possible. Plants can be hardened by watering only enough to prevent wilting and by gradually reducing the temperature, starting about 14 days before transplanting. However, be watchful for bolting, which can be triggered by plant stress. Plants can be set by hand or by machine and are ready for harvest after about 6 weeks.