CROWN DIVISION One simple and reliable method for propagating plants at home is crown division. As a general rule, plants that flower in the spring and early summer should be divided in late summer or fall. Those flowering in the summer and fall should be divided in early spring before new growth begins. For crown division of herbaceous plants, such as irises, the clumps should be carefully lifted and some soil removed from the roots. The crown may then be cut into sections with a knife or other sharp tool. Individual shoots that contain roots may be used to form new plants, or if a larger plant is desired, several shoots may be left together. In large, old crowns, it is often best to discard the older, center portions and replant the young, more vigorous shoots that have developed on the edges of the clump. Table 1: Some common perennials…
