Oriental poppy

Sun

Full sun; light afternoon shade can help in warmer locations, but too much shade reduces flowering.

Water

Water regularly while establishing. Once established, water during prolonged dry spells in active growth; keep dormant crowns relatively dry in summer.

Soil

Well-drained soil, preferably moderately fertile and neutral to slightly alkaline. Avoid ground that stays wet in winter.

Height

2-3 ft (0.6-0.9 m)

Spread

1-2 ft (0.3-0.6 m)

Flowers

Late spring to early summer; the species has orange to scarlet flowers, often with black basal blotches. Garden cultivars also offer pink, salmon, white and deeper red shades.

Foliage

Coarse, deeply divided, hairy green leaves form a basal clump. Leaves often die back after flowering, with fresh growth appearing in autumn or early spring.

Growth

Moderate; plants usually take a couple of growing seasons to establish substantial clumps.

Care needed

Low

• Choose a permanent position; the deep, fleshy roots dislike disturbance.
• Water new plants through their first growing season, but do not keep the soil saturated.
• Apply a thin layer of compost in spring, keeping it away from the crown; avoid heavy nitrogen feeding.
• Support tall flower stems early in exposed gardens.
• Mark dormant clumps so you do not dig into them or overwater them when the leaves disappear.

Pruning. Cut spent flower stems to the base unless you want seedheads. Once the leaves turn yellow after flowering, cut them back without damaging any fresh basal growth.

Early spring

Remove dead foliage, check drainage and apply a thin layer of compost around established clumps.

Spring

Plant container-grown plants and water them in; install supports before flower stems become tall.

Late spring

Enjoy the flowers and remove spent stems unless retaining seedheads.

Summer

Remove yellowed foliage and avoid routine irrigation over dormant crowns.

Autumn

Plant in well-drained ground while the soil is workable; leave emerging basal foliage intact.

Winter

Take root cuttings from established plants if you want to propagate a named cultivar.

• Plant in sunny mixed borders for a brief, bold display before summer perennials take over.
• Combine with catmint or hardy geraniums to soften the coarse foliage and cover summer gaps.
• Repeat small groups through cottage gardens rather than leaving isolated plants.
• Use orange and scarlet forms with purple salvias for strong colour contrast.

Garden styles it suits: English country, Cottage garden, Arts and Crafts, Romantic rose garden, Hot border and Pollinator garden.

Plant it with: Catmint, Hardy geranium, Perennial salvia, Daylily, Baby's breath and Switchgrass.

Wildlife: Open flowers supply pollen for bees, including bumblebees; they offer little or no nectar. Deer and rabbits often avoid the hairy foliage, but browsing resistance is not guaranteed.

• Crown and root rot in wet soil: improve drainage or move plants to a raised bed; do not bury the crown.
• Poor flowering in shade or overly rich soil: provide full sun and stop high-nitrogen feeding.
• Aphids on young shoots and buds: dislodge with water and encourage natural predators.
• Powdery mildew on foliage: improve air circulation, avoid crowding and remove badly affected leaves.

Treat all parts, including the milky sap, as toxic if eaten by people, cats, dogs or horses. Alkaloids can cause digestive upset and potentially serious nervous-system effects; risk varies with the amount eaten. Sap may irritate skin. Do not use its seeds as a substitute for culinary poppy seed, and seek medical or veterinary advice after ingestion.

• Common poppy (Papaver rhoeas)

  An annual with smaller flowers and a slender, branching habit; it does not form the persistent, substantial rootstock of Oriental poppy.

• Opium poppy (Papaver somniferum)

  An annual with smooth, waxy blue-green leaves that clasp the stems, rather than the distinctly hairy, divided leaves of Oriental poppy.

• Iceland poppy (Papaver nudicaule)

  Usually a smaller, short-lived plant with smaller flowers on slender, leafless stems; yellow flowers are common, unlike Oriental poppy.

The epithet orientale means 'eastern', referring to the plant's origins in southwestern Asia.

Propagation. Take root cuttings during dormancy to preserve named cultivars. Seed-grown plants may differ from the parent, and many garden plants sold as Oriental poppies have hybrid ancestry. Divide only when necessary, in late summer or early autumn; pieces of root left behind can regrow.

Accepted botanical name

Papaver orientale

In the US and Canada

Introduced in Canada and the lower 48 states.

Native range

Iran, North Caucasus, Transcaucasus and Turkey.

Measured

Average height 5 cm.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.