Ornamental · Papaveraceae
Bleeding Heart
Lamprocapnos spectabilis
Give it shade, steady moisture, and rich soil, and bleeding heart strings out rows of pink hearts every spring.
Partial shade
Every 3–7 days
USDA 3–9
2–3 ft · 0.6–0.9 m
Overview
Bleeding heart steals the spring shade garden, hung with rows of plump, heart-shaped flowers that swing from each arching stem, every one finished with a little white drop at the tip. It runs in the poppy family and traces back to the woodlands of eastern Asia, where it thrives in cool, dappled light beneath taller trees. Drop it into a shady corner and it pours that same soft, woodland feel right into the spot.
Here is a hardy perennial that storms back on its own year after year and shrugs off winters down to USDA zone 3. The flowers fire up in spring, often before the leaves have fully unfurled, and the show rolls on through April and May. Then midsummer brings one move that catches plenty of new gardeners off guard, so it pays to see it coming.
As the heat climbs, the foliage yellows and dies back and the plant dives into summer dormancy until the next spring. The roots stay alive and kicking underground the entire time. Plan for that gap and team it up with later-rising neighbors, and you land a plant that asks for next to nothing once it digs in.
Care
The short version: plant it in partial to full shade in rich, humus-filled soil, keep that soil evenly moist through spring and summer, and never let it sit in soggy ground over winter.
Light
Bleeding heart craves partial to full shade, the cool, dappled light it would catch under trees in the wild. A little morning sun is fine, but hot afternoon sun scorches the leaves and kicks the plant into dormancy early.
Water
Keep the soil evenly moist through spring and summer, since this plant cannot handle summer drought. Steady moisture also holds the foliage longer before it fades. Just never let it sit in soggy, waterlogged ground, especially over winter, or the roots rot.
Soil
Plant it in moist, well-drained soil rich in humus, the loose, leafy ground you find on a woodland floor. It shrugs at acidity and grows well anywhere from pH 6.0 to 8.0, so work in plenty of compost and you are off to the races.
Humidity
Ordinary garden humidity suits it fine, so skip chasing any level. What this plant truly chases is moisture in the soil, not moisture in the air.
Feeding
A light feeder, it thrives on compost or organic matter worked in each spring, or a balanced fertilizer through the growing season. Rich, humus-filled soil often handles its needs with no extra help.
Pruning
There is no real shaping to do here. Snip off the spent flower stems to keep the plant tidy, then cut back the yellowing foliage as it dies down in midsummer. Leave the roots in place and growth charges back next spring.
Size & spacing
A mature clump shoots to 2 to 3 feet (61 to 91 cm) tall and spreads 18 to 30 inches (46 to 76 cm) wide. Give each plant that much room, and remember the gap it leaves behind once it goes dormant in summer.
When to plant
Bleeding heart runs on a spring schedule and rewards anyone who follows it. Set out dormant roots or divisions in spring or fall, watch the flowers fire up in April and May, and expect the foliage to fade by midsummer as the plant dives into dormancy for the year.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: Seed is slow and difficult; division is preferred over indoor sowing.
- Plant: Plant dormant roots or divisions in spring or fall in a shaded, woodland-type site.
- Harvest: Blooms in spring, typically April to May, often before leaves fully emerge.
Hardiness
USDA hardiness zones: 3–9
Temperature: down to -40°C
Troubleshooting
Bleeding heart is an easy grower with only a handful of quirks, and most are not even problems. The big one, summer dieback, is normal and needs zero fixing. Match what you see below before you grab the trowel.
Plant rotting, collapsing, or refusing to return
Soft, mushy roots almost always point to wet feet, the trouble that comes from soggy, poorly drained ground, and winter wet hits the hardest. Dig in a good helping of organic matter to open the soil right up, then shift the plant somewhere water never pools around it. Nail that and you give bleeding heart exactly what it craves: steady moisture while it grows, sharp drainage the rest of the year.
Fix:
- Improve drainage by amending with organic matter
- Relocate to a well-drained site
Leaves yellowing and dying back in midsummer
Good news first: this is summer dormancy, and the plant is very much alive. Once the spring show wraps and the heat and dry soil roll in, the plant ducks underground for a rest and runs that same playbook every year. Keep the soil moist to stretch the foliage out, slot a hosta or fern in to cover the gap, and leave those roots alone so the whole plant charges right back next spring.
Fix:
- Keep soil moist to prolong foliage
- Interplant with hostas or ferns to fill the gap
- Leave roots undisturbed; growth resumes the following spring
Sticky, twisted new growth crawling with tiny insects
Spot those soft little bugs swarming the fresh spring shoots and you have found aphids, with that sticky film being the honeydew they drop. Knock them flying with a hard jet of water, then hit any stragglers with insecticidal soap. Dial back the nitrogen too, and you starve out the lush new growth they pile onto, which keeps them in check.
Fix:
- Spray off with a strong stream of water
- Apply insecticidal soap if needed
Toxicity
Keep this one well away from mouths. Every part packs isoquinoline alkaloids, with the most loaded into the roots and foliage, and it is listed as toxic to cats, dogs, and horses plus a known poison for grazing livestock. People should not eat it either, and even handling the leaves can irritate sensitive skin, so wear gloves and keep children and animals from chewing it.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Mild
A cat that nibbles a leaf usually drools and brings its food back up, with diarrhea right behind. A bigger mouthful can drive things further into tremors and even convulsions, so keep the plant out of paw's reach.
Dogs Mild
Dogs that chew the foliage typically drool, vomit, and run loose stools. Eat enough and the alkaloids can set off shaking and seizures, so a big helping earns a fast vet call.
Horses Moderate
Horses take this one harder than the small pets. Grazing brings drooling, a churning gut, and diarrhea, and a heavier feed can trigger trembling and convulsions.
Rabbits Toxic
Rabbits usually steer clear of bleeding heart, but the leaves and roots are loaded with the same alkaloids, so treat it as off-limits and keep it out of their reach.
Livestock Toxic
This plant is a documented poison for grazing stock like cattle, sheep, and goats. Animals that plow through a quantity can stagger and convulse, so keep it well clear of the pasture.
Birds Toxic
The same alkaloids that hit mammals make the foliage and roots a bad bet for birds too. Keep poultry and pet birds from pecking at any part of the plant.
People Caution
No part of bleeding heart is food, and eating much of it can make a person sick from the isoquinoline alkaloids. Even handling the foliage can irritate sensitive skin, so pull on gloves and keep curious kids from putting it in their mouths.
Contact with the foliage can cause skin irritation in sensitive people; wear gloves when handling.
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 straight species is what most gardeners grow, and it delivers, but a few named selections bring a different color or extra heat tolerance to the table. These are the ones worth chasing down.
Alba
A crisp white form that powers through summer heat a little better than the species.
Gold Heart
Grown for golden-yellow leaves that fire up a shady spot and make the rose-pink flowers leap out.
Valentine
Flaunts red-and-white flowers on dark red stems for a deeper, moodier punch.
How to propagate
Bleeding heart grows from division rather than seed, which crawls along and frustrates. Split an established clump and you score ready-made plants that flower far sooner.
DivisionModerate
Divide the clump in spring or fall while dormant or just emerging. · Reaches mature size within about 2 to 3 seasons.
Division is the surefire way to multiply your plants, and it works best in spring or fall while the clump is dormant or just pushing up. The roots are brittle and fleshy, so lift and split them with a gentle hand, then plant them right back into moist, shaded, humus-rich soil. Hand each new division 2 to 3 seasons to dig in and grow to full size, and the payoff is well worth the wait.
Myths
Bleeding heart is safe around pets because it is just an ornamental flower.
Looks fool plenty of people here, because every part packs isoquinoline alkaloids and the ASPCA lists it as toxic to cats, dogs, and horses. Chewing it brings drooling, vomiting, and diarrhea, and a large dose can climb to tremors and convulsions. Pretty does not mean safe, so keep pets and livestock from grazing it.
The plant has died once its leaves yellow and vanish in summer.
Hold off on the funeral, because that dieback is the plant's normal habit, not its end. The roots keep right on living underground through the dormant stretch, and the whole plant bursts back the following spring as if nothing happened.