Cutting the head into florets makes for easier freezer storage. Why You Can't Freeze Raw Cauliflower: "If you just freeze it ...
Cauliflower florets, on the other hand, have a shorter shelf-life, lasting only about five days in the fridge. If you have leftover raw or steamed cauliflower, you can freeze it for up to eight ...
To freeze, divide the cauliflower into florets and wash. Blanch in boiling water, drain, plunge into iced water and drain again. Transfer to freezer bags, label and seal. Cook from frozen.