Peony · last checked 2026-09-28
When to prune peonies: cutting back in fall, planting, bloom
Garden peonies die back to the ground each winter and can stay in one spot for many years. The Extension pages we read agree that buds planted too deep are a common reason for no flowers.
Each line below names the Extension service it comes from and links to their page. Tree peonies are woody shrubs and are treated differently where a service says so.
When to plant
- Clemson Cooperative Extension says fall is the best time to plant both herbaceous and tree peonies in South Carolina. How to Grow Peonies in South Carolina (HGIC fact sheet) · checked 2026-09-28
- University of Wisconsin–Madison Extension says September and October are the months to move established peonies or divide their roots. Peony (Wisconsin Horticulture) · checked 2026-09-28
Cold hardiness
- University of Wisconsin–Madison Extension says peonies grow in zones 3 to 8. Peony (Wisconsin Horticulture) · checked 2026-09-28
Sun and soil
- Illinois Extension says peonies need moist, well-drained soil in full sun; shade or competing tree roots lead to poor flowering or none. Peony (Flowers) · checked 2026-09-28
- Clemson Cooperative Extension says herbaceous peonies need at least six hours of direct sun a day to bloom well, while tree peonies should have dappled or afternoon shade. How to Grow Peonies in South Carolina (HGIC fact sheet) · checked 2026-09-28
- University of Wisconsin–Madison Extension says full sun, meaning 6 to 8 hours of direct light, in well-drained soil that is neutral to slightly alkaline. Peony (Wisconsin Horticulture) · checked 2026-09-28
Watering
- Clemson Cooperative Extension says water peonies deeply once every 10 to 14 days so they root deeply. How to Grow Peonies in South Carolina (HGIC fact sheet) · checked 2026-09-28
- University of Wisconsin–Madison Extension says keep new plantings watered and young plants moderately moist, but avoid soggy soil, which causes root rot; older plants handle drought better. Peony (Wisconsin Horticulture) · checked 2026-09-28
Spacing
- Illinois Extension says set the roots no more than 2 inches deep. Peony (Flowers) · checked 2026-09-28
- Clemson Cooperative Extension says dig a hole 12 to 18 inches deep and set the eyes no more than 1 inch below the surface; planting too deep causes most bloom failures. How to Grow Peonies in South Carolina (HGIC fact sheet) · checked 2026-09-28
- University of Wisconsin–Madison Extension says keep the buds 1 to 2 inches below the soil surface and leave 3 to 5 feet between plants. Peony (Wisconsin Horticulture) · checked 2026-09-28
When it blooms
- Clemson Cooperative Extension says in South Carolina peonies flower anywhere from March to May, depending on cultivar and weather, and garden peonies usually start blooming within three years of planting. How to Grow Peonies in South Carolina (HGIC fact sheet) · checked 2026-09-28
- Illinois Extension says mixing early, midseason and late cultivars stretches the bloom season over 4 to 6 weeks; new plants may take 2 to 3 years to settle in and flower. Peony (Flowers) · checked 2026-09-28
When to prune
- Clemson Cooperative Extension says after frost in fall, cut the dead stems of herbaceous peonies down to the ground, and take off seed heads once flowering ends. Tree peonies are shrubs and should never be cut back. How to Grow Peonies in South Carolina (HGIC fact sheet) · checked 2026-09-28
- University of Wisconsin–Madison Extension says deadhead after bloom, then in fall cut all the old leaves to the ground and throw them out rather than composting them, to head off disease. Peony (Wisconsin Horticulture) · checked 2026-09-28
Timing shifts with your local climate and the plant’s variety; your state’s Extension service has the final word. See how these pages are put together.
Other flowers: Daffodil, Hydrangea, Lavender, Mums (garden chrysanthemums), Rose, Tulip.