How Does it Grow host Nicole Cotroneo Jolly travels to Watsonville, California to discover the secrets behind growing a head of cauliflower. One of the most difficult aspects of the process is keeping the flowers of the plant white.
When the cauliflower is the size of a tennis ball, farmers take some of the biggest leaves and tie them over the head. They do this for one reason only: we like our cauliflower white. If the head of the cauliflower is exposed to the sun, it turns yellow.