Broccoli is relatively easy to grow, and home-grown is immeasurably better than the tough, bland material at the supermarket. It is a cool season vegetable that (in our relatively mild climate) we plant in fall, winter and spring. In cold-winter areas broccoli is planted in April and May and even through mid July if the summers are mild. Harvest before the flower buds open. Once the center head is cut, side shoots develop and will produce continuously when harvested regularly.