Peony

A long-lived perennial producing large, fragrant blooms each spring, thriving for decades once properly sited in full sun. Plant the tuberous roots with eyes no more than two inches below the soil surface, as planting too deeply is the most common reason peonies fail to bloom. Support the heavy double-flowered varieties with peony rings installed in early spring before foliage emerges. Ants often visit peony buds to feed on the sugary nectar and are harmless, so there is no need to treat for them.

Peonies are best propagated by division in early fall. Dig the established clump carefully and wash soil from the roots to reveal the eyes. Use a sharp knife to divide the crown into sections, each with three to five eyes and a healthy portion of roots. Replant divisions immediately at the correct depth with eyes one to two inches below the soil surface. Divisions may take two to three years to flower at full capacity. Peonies can also be grown from seed, but this is a slow process taking four to five years to reach flowering size and offspring may not resemble the parent plant.

The Season Plate

Your Peony Year

Composed for Zone 7 · typical seasons · frost passes Apr 2, returns Nov 1

Sow Peony Sep – Oct, pick May – Jun. Set your climate below and every date on this plate re-times itself.

Sowing window

Sep – Oct

re-timed to your frost dates

Plant out

after Apr 2

once frost risk has passed

First picking

around Sep 15

≈ 365 days from sowing · 20-40 flowering per plant

Composed for —ColdTemperateMildWarmUse my locationUsed once to set your season · only the zone is kept

Week-by-week Peony reminders watering, feeding and pruning, timed to your dates

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Frost alerts for your garden a warning before a cold night costs you the crop

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Succession sowing dates so the picking never gaps mid-season

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Get my Peony datesSaved to your free garden plan · no card needed

Choose a permanent planting site in full sun with well-drained, fertile soil, as peonies resent being moved and can thrive in the same spot for fifty years or more. Dig a generous hole eighteen inches wide and deep, and amend the soil with compost and a handful of bone meal. Plant bare-root divisions in early fall, positioning the eyes (pinkish-red buds on the crown) no more than one to two inches below the soil surface. Planting too deep is the single most common reason peonies fail to bloom.

Water newly planted peonies thoroughly and mulch lightly, pulling mulch back from the crown in spring to allow it to warm. Install peony support rings or grow-through grids in early spring before the foliage emerges, as the heavy double blooms will splay open and collapse after rain without support.

Once established, peonies are remarkably low-maintenance. Water during extended dry spells and apply a light dressing of compost and balanced fertilizer in early spring. Cut back the foliage to ground level after it dies back following the first hard frost in autumn, and remove all debris to reduce disease carryover. Herbaceous peonies require winter chill to bloom, making them unsuitable for tropical climates.

Peonies combine beautifully with other perennials that bloom at different times to extend the season of interest. Daffodils and tulips provide early spring color before peony foliage emerges. Iris, roses, and lavender bloom alongside peonies in late spring. Plant low-growing companions like catmint, geraniums, or lady's mantle around peony bases to hide bare lower stems. Avoid planting trees or large shrubs too close, as peonies need full sun and do not compete well for root space.

The Society Table

Rose belongs beside it. Fennel doesn't.

Old growers' knowledge, checked against Peony's real companion table below — test any plant you're growing.

Grows well in the company of · 3

RoseLavenderDaffodil

Keep apart · 1

Fennel

Plant Peony with good neighboursThe planner flags conflicts before they're in the ground

Related growing guides

Flowers

Rose

A good companion for Peony

Herbs

Lavender

A good companion for Peony

Flowers

Daffodil

A good companion for Peony

Flowers

Chrysanthemum

View growing guide

Peonies prefer deep, rich, well-drained soil with a pH of 6.5 to 7.0. Amend the planting hole generously with compost and incorporate bone meal for phosphorus, which promotes strong root development and flowering. Apply a balanced granular fertilizer such as 10-10-10 in early spring as red shoots emerge, and again just after flowering. Avoid high-nitrogen fertilizers, which encourage soft foliage growth susceptible to disease. Top-dress with compost annually in fall.

Ideal Temperature

Hardiness Zone Compatibility

Cut peony blooms for arrangements when buds feel like soft marshmallows and are showing color but are not yet fully open. Cut in early morning with stems twelve to eighteen inches long. Remove lower foliage that would sit below the waterline. For extended enjoyment, cut buds in the tight marshmallow stage, wrap in plastic, and store in the refrigerator for up to four weeks. Deadhead spent blooms but leave the foliage intact through summer to build energy for the following year.

Storage & Preservation

Fresh peonies last five to seven days in a vase with cool water and floral preservative. Peonies can be dry-stored in a refrigerator at 34 to 36 degrees Fahrenheit for three to four weeks when cut at the bud stage and wrapped in newspaper. To dry peonies, hang individual stems upside down in a dark, dry space for two to three weeks. Dried peony blooms are fragile but beautiful in arrangements. Peony petals can also be pressed flat between absorbent paper under heavy books for use in crafts and botanical art.

Botrytis Blight (Gray Mold)

Disease

Brown, water-soaked spots on young shoots in spring, buds that turn black and fail to open, gray fuzzy mold on affected tissue in wet weather.

Prevention Provide good air circulation and avoid overhead watering. Cut back and remove all peony foliage in fall to eliminate overwintering spores.

Fix: Remove and destroy infected shoots and buds immediately. Apply a copper-based fungicide as new shoots emerge in spring. Improve drainage around plants.

Peony Leaf Blotch

Disease

Large, irregular purplish-red or brown blotches on leaves, typically appearing in midsummer. May also cause small red-purple spots on stems.

Prevention Remove and destroy all foliage at end of season. Space plants for good air circulation. Avoid wetting foliage when watering.

Fix: No fungicides are specifically labeled, but copper sprays applied early may slow spread. Thorough fall cleanup is the most effective management strategy.

Thrips

Pest

Silvery streaks or spots on petals, especially on light-colored flowers. Petals may appear discolored or brown at the edges. Tiny slender insects visible inside blooms.

Prevention Remove spent flowers promptly. Keep the garden free of weed hosts. Blue sticky traps near plants help monitor populations.

Fix: Apply spinosad or insecticidal soap, targeting flower buds just before they open. Repeat applications may be needed during heavy infestations.

Root-knot Nematodes

Pest

Stunted plant growth, yellowing foliage, poor flowering. Swollen knots or galls visible on roots when plants are dug up.

Prevention Plant in nematode-free soil. Interplant with marigolds, which suppress nematode populations. Avoid moving soil from infested areas.

Fix: Heavily infested plants should be removed and destroyed. Solarize soil with clear plastic for six to eight weeks in summer before replanting. Amend soil with chitin-based products.

Troubleshooting Common Problems

Failure to bloom is the most common complaint and is almost always caused by planting too deep, insufficient sunlight, or immature plants that have not yet established. Newly planted peonies may take two to three years to produce their first full blooms. Flopping heavy double blooms result from lack of support, so install peony rings early. Late spring freezes can damage emerging buds, resulting in a lost bloom season. Ants on buds are harmless and feed on sugary nectar without damaging the flowers.

Growing Tips

1. Plant peony bare-root divisions in autumn (September to November in the Northern Hemisphere) with the topmost eyes positioned exactly 3-5 cm below the soil surface. This planting depth is critical — too deep and the plant will produce lush foliage but few or no flowers, which is the single most common cause of non-blooming peonies.
2. Choose a planting site in full sun with at least six hours of direct sunlight daily. Peonies tolerate light afternoon shade in hot climates, but insufficient light leads to weak stems, fewer flowers, and increased susceptibility to fungal diseases. Avoid planting near large trees whose roots will compete for moisture and nutrients.
3. Prepare a generous planting hole at least 45 cm wide and 30 cm deep, incorporating plenty of compost and a handful of bone meal. Peonies are long-lived plants that may occupy the same spot for decades, so thorough soil preparation at planting time is an investment that pays dividends for generations.
4. Provide sturdy support for double-flowered varieties before stems reach full height — peony support rings or grow-through grids installed in early spring are essential. Heavy double blooms become waterlogged after rain and will collapse to the ground without support, ruining the display and potentially snapping stems.
5. Water deeply and consistently during the bud development phase in spring, providing 2-3 cm of water per week if rainfall is insufficient. Drought stress during bud formation results in blind shoots (stems without flowers), smaller blooms, or buds that abort before opening.
6. Resist the temptation to cut back peony foliage after flowering — the leaves must remain intact through summer and into autumn to photosynthesise and store energy in the roots for next year's blooms. Cutting foliage prematurely in summer will significantly reduce flowering the following spring.
7. Remove and dispose of all peony foliage and stems after the first autumn frost rather than composting them. Peony foliage commonly harbours botrytis blight (grey mould) spores that overwinter on dead plant material and reinfect emerging shoots the following spring. Clean autumn hygiene is the most effective disease prevention measure.
8. Avoid transplanting or dividing peonies unless absolutely necessary — they resent root disturbance and may take two to three years to re-establish and resume full flowering after being moved. When division is needed, do it in early autumn and ensure each division has three to five healthy eyes and a substantial section of tuberous root.
9. Feed peonies twice a year — once in early spring as red shoots emerge with a balanced granular fertiliser, and again immediately after flowering with a potassium-rich feed to support root development and next year's bud initiation. Avoid high-nitrogen fertilisers, which promote lush foliage at the expense of flowers.
10. For the longest vase life when cutting peonies, harvest stems when buds are at the 'soft marshmallow' stage — they should feel like a soft marshmallow when gently squeezed and show some petal colour. Cut in the early morning, place immediately in cool water, and expect seven to ten days of vase life. Buds cut at this stage can also be stored dry in a refrigerator for up to four weeks and will open normally when placed in water.