Maincrop beetroot that’s still in the garden is best lifted and stored before the weather turns very cold and damages the roots. Simply lift the roots, twist off the foliage and remove any soil sticking to the beetroot. To store, add a layer of damp sand or old potting compost to a crate, then space out the roots on it. Cover over with more sand or compost and build up the layers until the crate is full. In a cold but frost-free shed it should keep until spring. When you want some roots, simply dig down by hand into the crate.