Divide clumping plants
Autumn is a good time to divide crowded clumps of agapanthus (left), clivia, liriope, spider lily, dianella and other clumping plants. Sharpen your spade, so you get a nice clean cut through the roots. If the soil is hard to penetrate, loosen it first with a garden fork or give the ground a good soaking a couple of days beforehand to soften it up. Your divisions can be whatever size you like, as long as they have lots of healthy roots. Trim any ragged roots cleanly with secateurs before replanting.