How to Grow Peonies: Complete UK Care Guide

Peonies are long-lived perennials prized for their large, often fragrant blooms in late spring and early summer. The key to success in UK gardens is getting planting depth right, choosing between herbaceous, tree or Itoh types to suit your space, and giving plants an open, sunny position with rich, well-drained soil.

Attribute	Detail
Botanical name	Paeonia spp. and cultivars
Plant type	Herbaceous or woody perennial
Height & spread	0.6–1.5m depending on type
Hardiness	RHS H6-H7 (fully hardy)
Position	Full sun to light shade, sheltered from wind
Soil	Fertile, well-drained, neutral to slightly alkaline
Flowering period	Late May to June
Difficulty	Moderate; patience required to establish

Choosing varieties: herbaceous, tree and Itoh

Herbaceous peonies die back completely each winter and are the most widely grown type. Tree peonies keep a woody framework above ground and flower earlier, while Itoh (intersectional) hybrids combine tree-peony flower form with a compact, herbaceous habit that dies back in autumn.

Variety	Type	Flower	Notes
'Sarah Bernhardt'	Herbaceous	Pale pink, double	Fragrant, classic cut-flower variety
'Duchesse de Nemours'	Herbaceous	White, double	Strongly scented, reliable
'Bartzella'	Itoh	Yellow, semi-double	Sturdy stems, does not need staking
'Cora Louise'	Itoh	White with purple flares	Compact and floriferous
Paeonia suffruticosa 'Rock's Variety'	Tree peony	White with maroon centre	Woody, needs minimal pruning

Where and when to plant

Choose an open, sunny site sheltered from strong winds, with fertile, well-drained soil; peonies dislike waterlogging. Plant bare-root peonies in early autumn, or container-grown plants in spring or autumn. Once established, avoid moving them, as peonies resent disturbance. Explore more border ideas in our flowers and seasonal guide sections.

How to plant

1. Dig a generous planting hole and incorporate well-rotted organic matter.
2. Position the crown so buds ("eyes") sit no more than 2.5cm below the soil surface.
3. Backfill gently, avoiding excessive firming that compacts soil around the crown.
4. Water in thoroughly.
5. Space plants at least 75cm apart to allow for spread.
6. Mulch lightly, keeping mulch away from direct contact with the crown.

Watering and feeding

Water well in the first year while roots establish, then only during prolonged dry spells once mature. Apply a balanced fertiliser or well-rotted compost in early spring as growth begins, and a potash-rich feed after flowering to support next year's buds. Avoid high-nitrogen feeds, which promote leafy growth at the expense of flowers.

Pruning, cutting back and deadheading

Deadhead spent blooms on herbaceous and Itoh peonies to tidy the plant, cutting back to a leaf joint. Cut herbaceous and Itoh foliage down to ground level in autumn once it has died back. Tree peonies need minimal pruning; simply remove dead or damaged wood in late winter, taking care not to cut into old wood that carries next year's buds.

Dividing and propagation

Herbaceous peonies can be divided in early autumn, lifting the clump and cutting the crown into sections, each with three to five buds, using a sharp knife. Replant immediately at the correct shallow depth. Division sets plants back and they may take a couple of years to flower well again, so only divide when necessary.

Growing in pots

Compact Itoh and herbaceous varieties can be grown in large, deep pots of at least 45cm using a loam-based compost such as John Innes No. 3. Ensure sharp drainage and plant at the shallow depth as for open ground. Feed and water container plants more attentively than those in the border, and top-dress annually.

Common problems

Problem	Symptom	Fix
Failure to flower	Healthy foliage but no buds	Check planting depth is shallow enough and site gets enough sun
Peony wilt	Stems blacken and collapse, grey mould	Cut out affected stems, improve air circulation, remove debris
Botrytis blight	Buds turn brown and fail to open	Remove affected buds, avoid overhead watering
Ants on buds	Ants swarming over unopened flowers	Harmless, drawn to nectar; no treatment needed

Month-by-month care calendar

Month	Task
March	Apply balanced feed; install support hoops
April–May	Watch for peony wilt; water in dry weather
Late May–June	Flowering period; deadhead as blooms fade
July	Apply potash-rich feed
September–October	Ideal time to plant bare-root peonies or divide clumps
November	Cut back herbaceous and Itoh foliage after die-back
Winter	Prune dead wood from tree peonies; mulch borders