How to store cauliflower
The best way to store cauliflower is in the refrigerator in a plastic or paper bag.
Store cauliflower with the stem-side down to prevent any moisture from collecting in the florets and possibly causing the head to spoil.
The cool temperatures of the crisper drawers in a refrigerator will keep a raw, unwashed head of cauliflower fresh for a week to 10 days.
Cauliflower that has already been washed and prepped into florets should be kept for no longer than 3 or 4 days. You should eat cooked cauliflower within 2 to 3 days, otherwise it may start to smell sulfur-y.