There is a trade-off between the size and compactness of the head and the plant's resistance to frost and drought. Warm weather varieties are the true cauliflowers with large heads. Cauliflower is probably the greediest feeder of all plants and the curds will not form properly unless the ground is in good health. Indeed it is a good test of the fertility of the soil to be able to produce fine cauliflowers from the garden.
Cauliflower is not the easiest crop but if you give it what it needs-moisture, well-limed soil, and lots of compost-it can be grown well in most places. Coastal weather is ideal, and makes cauliflower relatively easy to grow The key is to keep it growing, so don't let it sit in the flat too long, or go without good soil and water. During hot weather, a taller crop giving afternoon shade is a good idea - or use shade cloth.
Brassica oleracea / C/Matures 8-12/Harvest 1-2/Yield 44-291/Sp 15"