Perennial plants can be long-lived stars in the garden. However, they may not look their best forever. Like aging movie actors, they require a little nip 'n tuck now and then to appear and perform their best.
A general rule to follow is to divide fall-blooming plants in spring. Dividing when the new growth is emerging and not when a plant is flowering allows it to focus all of its energy on regenerating roots. Look out for signs of aging: Perennials will die out from the center, or start to have fewer and smaller flowers.
There are many reasons to divide perennials. Dividing:
Reduces the competition. Overcrowded plants that compete for nutrients and water are more prone to disease.
Stimulates healthy growth.
Keeps spreading plants under control.
Increases the number of plants for your garden and your friends. That is, you save money and make fellow gardeners happy at the same time.
Choose a cool, cloudy day with rain in the forecast. Weather conditions do contribute to the successful reestablishment of your perennials. If conditions are not ideal, keep divisions moist by putting them in a bucket of water, or cover roots with dampened newspaper until replanting.
To divide a perennial, either cut down into the clump with a sharp spade and lift out the separate chunks, or dig up the entire plant and pry it apart by hand. Replenish the soil with good compost to maintain fertility, and give the divisions that good organic stuff they need. Then set the roots in their holes, cover them up, and water them well after replanting. Start dividing today. After all, it won't be long before it's showtime!
Phyllis Gricus is the owner of Landscape Design Studio, in Pittsburgh, PA, creating sustainable and imaginative gardens for all seasons. You can reach her via email or on Facebook.
