Although a cool weather crop, cauliflower cannot tolerate spring frosts. It also requires slow and steady growth without interruptions from drought or other problems in order to produce a large blemish-free head. Growing Tips: Cauliflower is a heavy feeder and requires rich, moist soil that is high in organic matter and has pH above 6.0. As it will not head up in hot weather, the creamy white curd needs to be protected. When the heads first become visible, gather the outer leaves and secure them together with a clothespin, string or an elastic band, hiding and protecting the curd. This blanching process will encourage a beautiful pure white cauliflower.