Most people start thinking about their summer garden in early spring; starting seeds, spreading mulch and trimming outdoors and stocking up on any essentials at your local garden center. But did you know that you can start prepping next summer’s garden in the fall? Specifically, this can be done by dividing your perennials during fall, with the ultimate goal of achieving even bigger, more beautiful blooms next year.
Why Is It a Good Idea to Divide Perennials?
Johanna Oosterwyk, Manager of the University of Wisconsin-Madison’s instructional D.C. Smith Greenhouse, says that in general, fall is a great time for planting divided perennials, since the weather is cooler and there is usually plenty of rain to help plants establish. “This applies to digging up and dividing existing plants as well as planting new ones,” she adds.
What Perennials Can You Divide?
When dividing perennials, keep in mind that you should only be dividing perennials that bloom during spring and summer, not fall. Oosterwyk says that perfect perennials for dividing include hostas, daisies, helenium, daylilies, astilbe and other spring/early summer bloomers.
“A good rule of thumb is to transplant opposite the bloom,” she further explains. “So fall is the best time to transplant spring blooming perennials like peonies and daisies.”
Steps to Divide Perennials in Fall
First of all, Oosterwyk says that you should avoid dividing perennials while they are in bloom, “as it adds stress to plants that are already putting their energy into flowering.”
But if they’re not blooming and you’re in the clear, you can begin by digging up the plant and keeping as much of the root intact as possible.
“Knock off any loose soil and examine the roots,” Oosterwyk advises. “Some plants will show obvious sections that can be split into division, and others will present as a solid mass of roots. If the root is a solid mass (i.e. daylilies or hostas), lay the plant on its side, and using the sharp edge of your spade, cut the mass into 2-3 smaller pieces. Replant each of these pieces in its own spot in the garden. Water thoroughly immediately after planting.”
If your top goal is to have your perennials produce more flowers next spring and summer, Oosterwyk says that it’s key to not divide the plants into too-small pieces. A healthy plant can usually be divided into two or three smaller portions.
She adds that you can also consider adding a fertilizer with good phosphorous (like bone meal) to encourage blooms.
Related: Pamela Anderson’s Planting Tips Will Inspire Your First Garden
This story was originally reported by Parade Home & Garden on Aug 31, 2025, where it first appeared in the Gardening section. Add Parade Home & Garden as a Preferred Source by clicking here.
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