When Are Peonies Separateable?

September is the best month to divide or move peonies, as well as other perennials, in zones 4 to 7. The golden period for division is fall, with late September to early October being the ideal time. By autumn, peonies have finished their blooming cycle, and by dividing them every three to five years, they can ensure their health and robustness. The best time to divide peonies is in the early fall when the foliage is beginning to die back.

Positive propagation involves digging up the entire plant and cutting large roots into sections with at least three healthy pink eyes per division. Replanting the divisions into well-draining soil in a sunny spot and waiting for them to re-emerge in spring is essential. Peonies should be divided during their dormant season, typically in late September or early October, to allow the plants to establish new roots before the ground freezes.

Transplanting and dividing peonies are best done in late autumn, around September, but can be done as late as October. By this time, the peony has stored adequate food reserves for the following year. If you already have a peony growing in your garden, you can divide it to come by more plants.

Dan Furman, a third-generation peony grower, recommends waiting until October when your peony is dormant to cut back any dead foliage to about 2cm above the ground. Be careful not to damage any “eyes” or buds that are still there.

In conclusion, September is the best time to divide or move peonies, as it allows plants to establish roots before the ground freezes and allows them to grow and thrive.