A very handy way to recycle the plastic containers is to use them as temporary cloches. When the cauliflower have 3 or 4 real leaves they are ready to be planted out. However they could still benefit from some protection and these containers are ideal. All that you need to do is to fit a hold in the base to allow air to circulate. They are also good protection against chicken attacks. Normally the chickens are helpful in the vegetable garden as they eat the wire worms, leather jackets and other nasty visitors. But sometimes, just out of badness, they will go for the seedlings and this is a handy defence.