Learn the best time for dividing perennials in your garden
Even though perennials bloom year after year, that doesn't mean that you can plant them and forget them. The best way to keep them healthy and to keep them from crowding out other plants is to divide them before summer growth begins.
For perennials that bloom in spring to early summer, fall is the best time to divide:
For perennials that bloom in summer or fall, divide in spring:
Thin perennials when they start getting overgrown. When crowded, the plants produce fewer blooms and are more likely to become diseased. Thinning is an easy, inexpensive way to generate more plants and to prevent one species from crowding out others.
The basic tools you need for this task are:
A few tips to keep in mind as you divide perennials: