4. Dividing bulbs and corms
After a few years a clump may get crowded. Divide the clump by first digging up the bulbs or corms, then carefully separating them. Sometimes it's easier to dunk the bulbs or corms in some water for a few minutes to release them from the soil.
When? With smaller plants, the general rule is to do this just after flowering, before the leaves have died back, so that you can see where to dig.
