Bolting Broccoli: Growing Broccoli In Hot Weather - Broccoli is a cold weather crop, meaning that it will bolt or go to flower if it's too warm. To get tips for preventing bolting in broccoli plants and how to grow the crop in hot weather, read this article.
The secret to growing good broccoli is to keep it moist, and keep it cool until the plant is large enough to produce a good head. I have planted it in our rainy season in Hawaii in hopes of taking advantage of the coolness.*