Peony vs Rose: How to Tell Them Apart
The peony vs rose question starts with the stems. UConn notes peonies are herbaceous perennials with large, often fragrant blossoms, though tree peonies are woody. NC State Extension describes roses as woody, deciduous shrubs or vines in the rose family, with prickles on the stems plus flower parts in multiples of five.
The short answer
Garden peonies are herbaceous perennials whose foliage dies back each fall, while roses are woody shrubs or vines with prickles. Peonies bloom in late spring plus early summer. Roses bloom in summer plus need yearly pruning in late winter. Both want full sun. NDSU Extension notes peonies can bloom for 50 years or more.
How do peony and rose flowers differ?
UConn notes peony flowers come in almost every color except blue, in single, Japanese plus double forms. NC State Extension notes rose petal counts range from 5 to more than 20, with flowers 1 to 3 inches across. Rose flower parts come in multiples of five.
| Trait | Peony | Rose |
|---|---|---|
| Plant type | Mostly herbaceous perennial | Woody shrub or vine |
| Stems | Die back in fall, tree peonies woody | Woody with prickles |
| Height | 2 to 4 feet | 1 to 8 feet |
| Bloom | Late spring, six to eight weeks across types | Summer |
| Sun | 8 hours or more | 6 hours or more |
| Pruning | Cut foliage to 3 inches after hard frost | Yearly pruning in late winter |
Source: UConn Home and Garden Education Center plus NC State Extension.
Which blooms longer through the season?
UConn notes peony bloom time overlaps across four types, starting with woodland peonies in late spring, then tree, herbaceous plus intersectional peonies. Planting early, mid plus late season types can extend flowering for six to eight weeks. NC State Extension lists summer bloom for roses plus notes some groups are repeat blooming.
How is each pruned?
UConn suggests cutting faded peony blooms down to a set of leaves plus cutting peony foliage to 3 inches once a hard frost damages it. Do not cut back tree peonies. UF/IFAS suggests a major rose pruning once a year in January or February, removing dead, dying or crossing branches plus shortening mature canes.
How to: step by step
- Inspect the stems for woody growth plus prickles.
- Count the petals or look for multiples of five.
- Watch whether stems die back after frost.
- Site peonies in 8 hours of sun plus roses in at least 6.
- Set peony eyes 1 to 2 inches below the soil.
- Prune roses yearly in late winter.
Troubleshooting
Peony grows leaves but no flowers: planted too deep. NDSU Extension notes no more than 2 inches of soil should cover the top bud.
Peony buds turn brown: botrytis blight. NDSU Extension suggests clearing plant tops in late September or October.
Roses bloom poorly: too little sun. UF/IFAS notes roses need at least six hours of sun plus frequent water.
For related reading see cannabis leaf anatomy, companion plants when growing marijuana plus what roles do bees play in outdoor cannabis. Kind Seed Co also stocks cannabis seeds.
Sources
- Peony, UConn Home and Garden Education Center
- Peonies: a North Dakota favorite, NDSU Extension
- Roses, UF/IFAS Gardening Solutions
- Rosa (rose), NC State Extension Gardener Plant Toolbox
FAQ
Why won't my peony bloom?
NDSU Extension notes peonies fail to bloom for several reasons, including planting too deeply, too little sun, diseases such as botrytis plus insects such as thrips. No more than 2 inches of soil should cover the top bud. Shade from growing trees can also reduce blooms over time, so a sunnier site may help.
How long do peonies live?
A long time. NDSU Extension notes vigorous plants in fertile soil may grow plus bloom for 50 years or more. Once mature, peonies are ideally left undisturbed. Divided plants may take 2 to 3 years to recover plus bloom well. Space plants 3 to 4 feet apart to allow for growth over time.
Do roses need full sun?
Yes. NC State Extension notes roses require full sun, meaning 6 or more hours of direct sunlight a day, plus organically rich, well drained, acidic to neutral soils. UF/IFAS notes roses need at least six hours of sunlight plus frequent water plus fertilizer to bloom well. Old garden roses often need less care.
When should peonies be planted?
Early fall. UConn notes planting, transplanting or dividing peonies is ideally done in early fall but may be done in spring once soil is workable. Spring planted tubers may not bloom until the next year. NDSU Extension suggests late August through early September in North Dakota, while container peonies go in spring or early summer.
Are rose thorns really thorns?
No. NC State Extension notes the sharp structures on rose stems are prickles, not true thorns, plus their size plus number vary from species to species. It also notes native bees nest in dead, hollow rose stems, so gardeners can cut dead stems to 12 to 24 inches plus leave them standing.
