why do my broccili and cauliflower plants go to seed before reaching maturity?

Question

Two years running, plants get golf ball sized heads; I cover them with their leaves, but they soon start to color, grow long sprouts and go to seed, with no fruit .

Answer 1

Broccoli will bolt, or go to seed, when the soil exceeds 75 F. The best way will be to time the maturation period to before the temperatures get above this. This article will help: https://www.gardeningknowhow.com/edible/vegetables/broccoli/bolting-broccoli-growing-broccoli-in-hot-weather.htm