Cauliflower is a cool-season crop and a descendant of the common cabbage. It is more difficult to grow than its relatives because it does not tolerate the heat or cold as well. For this reason, cauliflower is usually grown commercially.
If you plant to attempt growing cauliflower in the home garden, it requires consistently cool temperatures with temperatures in the 60s. Otherwise, it may prematurely “button”—form small, button-size heads—rather than forming a single, large, white head.