Bulb · Ranunculaceae
Poppy Anemone
Anemone coronaria
Soak the corms, give them sun and sharp drainage, and poppy anemones light up spring in jewel colors.
Full sun
Every 5–7 days
84–120 days
USDA 7–10
Overview
Poppy anemones bring some of the boldest color in the spring garden, in cup-shaped blooms of red, blue, purple, pink, and white. They grow from small knobby corms rather than seed, and they belong to the buttercup family, the same clan as ranunculus. Each flower sits on a slender stem above a ruff of ferny leaves, which is part of why they cut and arrange so well.
They are perennial in mild ground but short-lived, hardy only in zones 7 to 10. Where winters bite harder, most gardeners treat them as annuals or lift the corms and start again, so the way you plant them depends a lot on where you live. Plant in fall in mild zones for early bloom, or wait for early spring where the cold runs deep.
Anemones reward a bit of fuss up front. Soak the corms, give them full sun and soil that drains fast, and they hand you a long run of flowers from April into June. The one thing they will not forgive is wet feet, so the corms rot in soggy ground.
Care
The short version: full sun to a little shade, rich soil that drains fast, and even moisture through the growing season. Soak the corms before planting, then ease off the water once the foliage dies back so the corm can rest.
Light
Anemones flower best in full sun, though they take partial sun or light shade in stride. Give them at least 6 hours of direct light a day, because too much shade trades flowers for leaves.
Water
Keep the soil evenly moist while the plant is in active growth from fall through spring, watering every 5 to 7 days as the ground dries. Once the flowers fade and the foliage dies back, ease off and let the corm take a drier rest, since wet ground in dormancy is what rots it.
Soil
Plant in rich, sandy, well-drained loam worked over with organic matter. They are easy on pH, happy anywhere from 6.0 to 8.0, but sharp drainage is the part they will not bend on.
Temperature
These are cool-season growers that take a wide swing in temperature, from about 10°F to 75°F (-12°C to 24°C). They handle frost in their hardy range but stall out in real summer heat, which is their cue to go dormant.
Humidity
Ordinary outdoor air suits them, so there is no number to hit. Good airflow counts for more than any humidity reading and helps keep the foliage clean.
Feeding
Work a balanced fertilizer or compost into the soil at planting, then feed again during active growth in spring. Rich, organic ground does most of the work, so there is no need to push them hard.
Pruning
Snip off spent flowers to keep the planting tidy and encourage more bloom. After flowering, leave the foliage alone and let it yellow and die back on its own, since that is how the corm recharges for next year.
Repotting
Lift and divide congested clumps every 2 to 3 years to keep them vigorous, or grow them as annuals and replant fresh corms each fall or early spring. Watch for fewer flowers and small, crowded corms, which are the signs a clump has outgrown its space.
Size & spacing
9–18 in (23–46 cm) tall
When to plant
Anemones run on a cool-season clock, growing through fall and winter and flowering in spring. Plant the corms in fall where winters stay mild, or in early spring where they turn cold, and look for blooms from April into June.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: Start corms in pots in fall for overwintering in a cool, frost-free space (e.g., cold frame or sunporch); set out in early spring
- Plant: Plant soaked corms 2-3 inches deep and 4-6 inches apart in fall in mild zones, or in early spring in colder zones
- Harvest: Spring bloom, April to June (or roughly 3 months after spring planting)
Hardiness
USDA hardiness zones: 7–10
Temperature: down to -18°C
Troubleshooting
Anemones carry few pests or diseases, so most trouble traces back to water and light rather than bugs. Read the early signs in the corms, the flowers, or the fading leaves, and you can usually fix the cause before it spreads. Match what you see below, then act.
Corms turn soft and rot before they sprout
Wet feet are the usual killer here. Corm rot sets in when the soil stays soggy or the corms sit too deep in heavy ground, and a lifted corm will feel mushy or look moldy. Dig out anything soft, work sand and compost into the bed, and replant the firm corms at the right 2 to 3 inch depth.
Fix:
- Improve drainage by amending soil with sand and organic matter
- Lift and discard rotted corms
- Replant healthy corms at the correct 2-3 inch depth in well-drained soil
Plenty of leaves but barely any flowers
When the foliage looks fine but the blooms never come, the plant is usually short on sun or short on root room. Anemones want at least 6 hours of direct light, and corms that have grown crowded and small stop putting on a show. Move them somewhere brighter, divide tight clumps, and feed the replanted corms in enriched soil.
Fix:
- Move or plant in a site with full sun to part shade
- Divide congested clumps and replant in enriched soil
- Feed with balanced fertilizer or compost at planting
Leaves yellow and brown off once summer arrives
Yellow foliage after the spring flowers is almost always normal dormancy, not a disease, as the plant pulls its energy back into the corm for next year. Let the leaves fade on their own and ease off the watering. Steady moisture through the rest period is the one thing that can turn a healthy die-back into rot.
Fix:
- Allow foliage to die back naturally and stop supplemental watering
- Reduce irrigation after flowering to give the corm a dry rest
Toxicity
Treat this as a plant to look at, not to nibble. Every part holds protoanemonin, an irritant in the buttercup family that burns the mouth and gut if eaten and can blister bare skin where the fresh sap touches it. Keep the corms and cut stems away from pets, livestock, and children, and pull on gloves before you cut or divide it.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Mild
A cat that bites the leaves gets a mouthful of irritating sap, so watch for drooling, pawing at the mouth, and vomiting. The damage stays in the mouth and gut and usually clears on its own.
Dogs Mild
Chewing the foliage leaves a dog drooling with a sore mouth and an upset stomach. Most dogs spit the bitter plant out fast, which keeps the reaction small and short.
Horses Toxic
The same protoanemonin that bothers smaller pets blisters a horse's lips and mouth and brings on colic and drooling. Horses tend to leave the bitter foliage alone unless grazing is thin.
Rabbits Toxic
Never offer anemone to a rabbit. The irritant sap inflames the mouth and digestive tract, and a small body handles it poorly.
Livestock Toxic
Cattle, sheep, and goats can suffer mouth blistering, drooling, and severe gut irritation if they graze it. Trouble shows up most where pasture runs short and animals turn to plants they would normally pass by.
Birds Toxic
Keep the plant and its cut stems away from pet birds, since the protoanemonin in the tissue irritates the mouth and crop. Treat it as off limits rather than risk a curious peck.
People Caution
No part of this plant is meant to be eaten, and a bite brings burning and a swollen, blistered mouth. The fresh sap can also redden and blister bare skin, so wear gloves when you cut or divide it.
Wear gloves when cutting or dividing, as fresh sap can irritate skin. Keep corms and cut stems away from pets and children.
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
Most garden anemones come from a few well-known strains, with a couple of named selections worth seeking out. These are the ones you are most likely to meet.
De Caen Group
A French-bred strain prized for cutting, with large single poppy-like flowers across a wide range of colors.
St. Brigid Group
A Dutch and Irish strain that carries semi-double to double flowers and makes an excellent cut bloom.
Mr. Fokker
A De Caen-type selection that flowers in a single, deep violet-blue.
The Bride
A De Caen-type selection with pure white single flowers.
How to propagate
You can multiply poppy anemones three ways, though they are far from equal. Corms are quick and easy, division keeps an old clump going, and seed is the slow road for the patient.
Bulbs & cormsEasy
Plant corms in fall in mild zones, or early spring in colder zones · Roughly 3 months to bloom after spring planting
Starting from corms is the easy, fast route, and it brings flowers in about 3 months from a spring planting. Soak the dried corms in lukewarm water for a few hours, no more than 4, to plump them up, then plant them 2 to 3 inches deep and 4 to 6 inches apart in rich, well-drained soil.
DivisionModerate
Lift and divide dormant tuberous rhizomes after foliage dies back · One growing season
Once a clump grows crowded, wait until the foliage dies back and the plant is dormant, then lift and split it. Dividing every 2 to 3 years keeps the corms vigorous and flowering well, and the splits settle in over a single growing season.
SeedModerate
Sow fresh seed; germination can be slow and erratic · Often more than one season to reach flowering size
Seed is the slow road. Sow it fresh, but expect germination to come slow and uneven, and count on more than one season before the plants reach flowering size, which is why most gardeners reach for corms instead.
Myths
Anemone flowers are safe to plant around pets and children.
Every part of the plant is poisonous. It holds protoanemonin, which burns and irritates the mouth and gut if eaten and can inflame or blister skin where the fresh sap touches it, so site it well away from pets and small children.
Poppy anemones live for years as reliable perennials everywhere.
They are hardy only in zones 7 to 10, and even there they tend to be short-lived. Many gardeners grow them as annuals, lifting or replanting the corms each season, and in colder zones they will not make it through winter at all.