7 Perennials You Can Divide in September to Double Your Plants for Spring (and Make Them Healthier, Too)
September is an excellent time to divide many perennials. Dividing perennials in the fall allows them to establish new roots before winter, resulting in healthier, more vigorous plants come spring
Here are 7 perennials that benefit from fall division:
Daylilies (Hemerocallis) - Divide daylilies in September after flowering. Dig up the entire clump and use a spading fork or knife to divide into sections with 3-5 fans each.
Peonies - While peonies don't need dividing often, September is a good time. Carefully dig up the entire plant and use a sharp spade to divide the tuberous roots into sections with 3-5 eyes each.
Irises - Divide bearded irises in late summer after they finish blooming. Cut the leaves back by half and replant the divisions 12 inches apart.
Mums - Garden mums benefit from division every 1-3 years. Divide in early September, cutting the plant back first and dividing into sections with several stems.
Hostas - Divide hostas in early fall. Lift the entire clump and use a knife or spade to cut into sections, making sure each division has roots and eyes.
Delphiniums - Divide delphiniums in early fall after flowering. Dig up the entire clump and use a knife to divide into sections with 3-5 shoots each.