Make sure that the plants have uninterrupted growth to avoid the plants to develop the head prematurely or ruin the edible part completely
Cauliflower requires consistent soil moisture with normal rainfall, this usually requires supplement watering
For best growth, side-dress the plants with a nitrogen fertilizer
When the white head is about 2 to 3 inches in diameter, tie the outer leaves together over the head with a rubber band, tape, or twine
This is called blanching, and it protects the head from the sun and helps you get that pretty white color
The plants are usually ready for harvest 7 to 12 days after blanching
Cauliflower Care:
Most cauliflower varieties require about 2 months to mature, although some are a little quicker and others can take up to 3 months
Since they will not form heads in warm weather and can only handle a light frost, be sure to choose a variety that will have enough time to mature in your climate
That means a fast maturing variety if your spring or fall is short
Longer maturing varieties are good choices for gardeners with mild or late winters