Ornamental · Papaveraceae
Oriental Poppy
Papaver orientale
Site it in full sun on free-draining ground and Papaver orientale rewards the position with enormous silken flowers each spring.
Full sun
Every 7–14 days
USDA 3–7
24–35 in · 60–90 cm
Overview
The oriental poppy is a hardy herbaceous perennial cultivated chiefly for its enormous, crepe-paper flowers in scarlet, orange, plum, and crimson, which open in late spring. An individual bloom persists only a few days, yet a clump in full flower reads as one of the boldest displays a border can hold. Its persistence rests on a deep, fleshy taproot that returns growth year after year and carries the crown through winters as cold as -40°F (-40°C).
One trait deserves attention before siting the plant. Following anthesis the entire plant enters summer dormancy, the foliage yellows and dies back, and the position stays vacant until fresh growth resumes in fall. That vacancy is a normal phase of the cycle rather than a symptom, and it should govern both placement and the choice of neighboring plants.
The species demands sun and drainage and little else. Once a clump has established, its taproot confers real drought tolerance, and it responds poorly to excess attention, above all to overwatering. Sited correctly and left undisturbed, it will outlast most neighboring perennials.
Care
The short version: full sun with sharp, well-drained soil, irrigated only after the top half has dried. Apply a light spring feed, anticipate midsummer dormancy, and otherwise leave the deep taproot undisturbed.
Light
Site an oriental poppy in full sun for optimal flowering, though it will accept light partial shade. Greater direct light produces sturdier flower stems and a heavier display, since photosynthate drives both structure and bloom.
Water
Let the top half of the soil dry between waterings, which in practice means irrigating only every 7 to 14 days. An established plant tolerates drought well, whereas saturated ground is the quickest route to taproot rot. Through summer dormancy its water demand falls to almost nothing.
Soil
Plant into well-drained loam or sandy soil, since drainage governs success here far more than fertility. The species accepts a broad pH range from 6.0 to 8.0, but a heavy, waterlogged site will defeat it.
Temperature
This is a strongly cold-hardy perennial, sound from -40°F to 86°F (-40°C to 30°C). The deep taproot allows the crown to overwinter through severe cold without protection.
Humidity
Ambient outdoor humidity suffices, so no target figure applies. Drainage and air movement contribute far more to health than atmospheric moisture.
Feeding
A single spring application meets the plant's needs, whether a balanced general-purpose fertilizer or a compost topdressing. Feeding is unnecessary once the plant enters its summer rest, when growth has ceased.
Pruning
Deadhead spent blooms, then cut back the yellowing foliage as the plant enters summer dormancy. Fresh basal leaves emerge in fall, so a cut-back clump is dormant rather than dead.
Repotting
Oriental poppies resent root disturbance and are rarely lifted or divided. Declining flowering paired with a crowded, weakening clump is the reliable signal that it has outgrown its position.
Size & spacing
Mature plants reach 24 to 35 inches (60 to 90 cm) tall with a spread of 6 to 24 inches (15 to 60 cm). Allow each clump adequate room at planting, since later lifting is best avoided.
When to plant
Oriental poppies follow a spring-anchored cycle. Establish them in spring or fall, expect the principal flush of bloom in late spring and early summer, then allow them to enter dormancy through the heat of the season.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: Late winter to early spring
- Plant: Spring or fall
- Harvest: Late spring to early summer
Hardiness
USDA hardiness zones: 3–7
Temperature: down to -40°C
Troubleshooting
Given its toughness, the oriental poppy presents few problems, and most reduce to one of two causes: soil that retains excess water, or the natural midsummer dieback that unfamiliar growers misread as decline. Identify the pattern below before applying any remedy.
Crown blackening, wilt, and progressive collapse of the clump
A blackened, collapsing crown is the classic signature of root rot, and in this species it traces almost always to soil that holds water around the fleshy taproot. Because that thick, storage root cannot respire in saturated ground, it breaks down into the mushy, dark, foul-smelling tissue you find on digging. Correct it by reducing irrigation, opening the drainage with sand or grit, and if the site stays wet, relocating the crown to a raised, free-draining bed.
Fix:
- Improve drainage by amending soil with sand or grit
- Reduce watering and avoid wet sites
- Move or replant in a raised, well-drained location
Yellowing leaves that wither away and open a midsummer void in the border
This midsummer dieback is summer dormancy, a programmed part of the life cycle rather than any disease, and it follows flowering each year without fail. As the top growth senesces the leaves yellow and the clump disappears, while the plant holds its reserves below ground and pushes fresh basal foliage in fall. Remove the spent leaves and set a later-emerging perennial such as baby's breath or Boltonia alongside, so the border carries interest through the dormant window.
Fix:
- Cut away withered foliage
- Interplant with later-developing perennials to fill the void
Toxicity
Regard this as a poisonous plant throughout. Every part carries isoquinoline alkaloids in its milky sap, so ingestion of the leaves, stems, or pods can sedate and sicken pets, livestock, and people alike. Exclude cats, dogs, horses, and grazing animals, keep children from the blooms and seed pods, and wash your hands after cutting stems.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Toxic
In a cat that ingests leaf tissue or sap, the alkaloids depress the nervous system, producing sedation, an unsteady gait, inappetence, and gastrointestinal upset. At very large doses that depression can deepen into a coma-like, hard-to-rouse sleep.
Dogs Toxic
A dog shows the same alkaloid effect as sedation, ataxia, drooling, and a refused meal, because the compounds in the sap act directly on the central nervous system. A large ingestion can therefore leave a dog dangerously sluggish and warrants veterinary attention.
Horses Toxic
A horse that grazes the foliage or trimmings tends toward drowsiness, dullness, and digestive upset as the alkaloids take effect. Exclude poppy from paddocks and keep it clear of anything they graze.
Rabbits Toxic
The alkaloids are distributed throughout the plant, so no part is safe for a rabbit. Deny access to the foliage and keep clippings out of the hutch.
Livestock Toxic
Cattle, sheep, and goats respond to the foliage with sedation and general illness, the expected result of alkaloid ingestion. Fence stock away from plantings and keep trimmings out of pasture.
Birds Caution
Because the toxic alkaloids pervade the whole plant, treat every part as unsuitable for pet birds and offer them none of it.
People Caution
No part of an oriental poppy is edible, and ingestion can make a person ill. Keep children from the conspicuous blooms and seed pods, and wash your hands after handling the milky sap.
Keep cut stems and plant trimmings away from pets and grazing animals; wash hands after handling the milky sap.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
The oriental poppies in commerce are largely named cultivars selected for flower color and stature. The following are the selections most often encountered.
Beauty of Livermere
A taller selection at 2 to 3 feet bearing deep crimson-red flowers, and because it self-seeds readily it can also be raised from seed.
Patty's Plum
Distinguished by its dusky plum-mauve flowers borne on stems around 2 to 2.5 feet tall.
Allegro
A compact cultivar at 1 to 1.5 feet whose bright orange-scarlet flowers suit a border front.
Turkenlouis
Notable for fringed, feathered scarlet-orange petals carried on stems 2 to 3 feet tall.
Companions
Plant near
Baby's breath (Gypsophila paniculata): Its sprawling form expands later in summer to fill the gap left when poppy foliage dies back.
Boltonia (Boltonia asteroides): Flowers in late summer and early fall, masking the void left by the dormant poppy.
How to propagate
Propagation proceeds either by dividing an established clump or by raising plants from seed, though neither route yields a quick return.
DivisionModerate
Fall, about four to six weeks before the ground freezes · 4 to 6 weeks to root before freeze; full establishment the following season
Divide the fleshy roots in fall, four to six weeks before the ground freezes, so each section can generate new roots before dormancy sets in. Because the divisions spend that first season re-establishing their root system, they settle in then but do not reach full flowering vigor until the following year.
SeedModerate
Late winter to early spring, or sow outdoors in fall · One to two seasons to reach flowering size
Sow in late winter to early spring, or direct-sow outdoors in fall, and surface-press the seed rather than covering it, since poppy seed is light-dependent for germination. Allow one to two seasons for a seedling to build the reserves needed to reach flowering size, and note that contented cultivars will self-seed.
Myths
Papaver orientale is the same species as the opium poppy, so growing it breaks the law.
Opium is derived from Papaver somniferum, a separate species altogether. Papaver orientale is an ordinary ornamental perennial, cultivated in gardens for generations, and it is not the opium poppy.