Ornamental · Papaveraceae
Bloodroot
Sanguinaria canadensis
A brief white spring ephemeral of shaded ground, rising from a rhizome that bleeds red and wants gloves.
Partial shade
Every 3–7 days
USDA 3–8
6–10 in · 15–25 cm
Overview
Bloodroot is one of the first wildflowers to open on the eastern woodland floor each spring. A single grey-green leaf pushes up curled tight around the flower bud, then loosens its grip and unfurls to hold a clean white bloom with a gold center above the leaf litter. The flower stays open only a few days, which is part of its charm.
The name comes straight from the red-orange sap that wells up and bleeds from the rhizome the moment it is cut. That same sap carries sanguinarine and related alkaloids, so this is a plant to take in with your eyes and handle with respect. Native peoples once worked it as a dye, and the color still stains skin and tools on contact.
Give it the floor of a forest and it asks for almost nothing. It grows slow but steady, knitting into a low colony over the years, then slipping underground by midsummer to wait out the heat. Set it beside ferns and it never leaves a bare patch behind.
Care
The short version: grow bloodroot under shade, from partial to deep, in dark, leaf-rich woodland soil. Let that soil stay damp through the spring while the leaves and flower are up, then leave the rhizome dry and untouched once summer dormancy pulls it below ground.
Light
Bloodroot belongs in part to full shade, the dappled light under a deciduous canopy. It will take a little spring sun before the trees leaf out, but a hot, exposed spot dries the soil and cuts the show short.
Water
Through the spring growth, hold the soil damp and never dried out, adding water every few days when the weather turns dry. After the plant sinks into summer dormancy it no longer minds drought, so watering can stop completely once the foliage withers away.
Soil
Plant it in moist, humusy, well-drained soil loaded with organic matter, the loose stuff that builds up beneath fallen leaves. A pH between 6.8 and 7.2 suits it, close to neutral, and a yearly topping of leaf mold keeps it content.
Temperature
Bloodroot shrugs off hard cold, thriving anywhere from 23°F to 75°F (-5°C to 24°C) across USDA zones 3 through 8. A true, frosty winter is something it welcomes and even relies on to bloom.
Humidity
Whatever moisture the open air holds is already enough, and no percentage needs watching. What truly counts is damp soil during spring, far more than any dampness drifting through the air.
Feeding
Set in rich woodland soil, bloodroot mostly nourishes itself and asks little else. A thin spring dressing of compost or leaf mold covers its needs, and a balanced organic feed steps in only where the earth runs thin.
Pruning
There is nothing to prune. Let the leaves yellow and die back on their own as the plant goes dormant, and lay down a thin blanket of deciduous leaf mulch over winter to feed the soil.
Repotting
Bloodroot seldom belongs in a fresh pot and hates being moved. Inside a container, look for weakening growth or thick rhizomes crowding and rising against the soil surface; only then should it be dug up and split, in autumn or as spring begins.
Size & spacing
Low and hugging the ground, bloodroot climbs no higher than 6 to 10 inches (15 to 25 cm). One clump widens to 6 to 12 inches (15 to 30 cm) and slowly stitches together a low carpet, so give each new plant about that span of room.
When to plant
Bloodroot keeps the rhythm of the woods. Set out rhizomes in fall or early spring, watch the white flowers open in March and April, and expect the leaves to fade by midsummer as the plant slips into dormancy.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Fall or early spring
- Harvest: March to April
Hardiness
USDA hardiness zones: 3–8
Temperature: down to -40°C
Troubleshooting
Bloodroot is rarely bothered by pests or disease, so most worries trace back to its own seasonal habits or the wrong site. Match what you see to the cases below before assuming something has gone wrong. More often than not, the plant is just doing what woodland ephemerals do.
Clumps sit still and refuse to spread
Bloodroot wants the shaded, damp floor of a woodland, and it stalls in too much sun or dry, lean soil. The other frequent culprit is seed that dried out before it reached the ground. Shift the planting into rich, moist shade, and propagate only with fresh seed or fall divisions of the red rhizome.
Fix:
- Move or establish plants in part to full shade with rich, moist, well-drained soil
- Sow only fresh seed that has not dried out; divide rhizomes in fall or early spring
Leaves go yellow and vanish by midsummer
This is summer dormancy, the normal habit of a spring ephemeral, not a disease. After the bloom has come and gone and the plant has stored its energy, the leaves yellow and shrink away while the rhizome rests underground until next spring. Leave it alone, and keep the soil from baking bone dry under a layer of leaf litter.
Fix:
- Allow the plant to go dormant; do not dig or discard the rhizome
- Keep soil from baking completely dry by mulching with leaf litter
Toxicity
Treat the whole plant as poisonous. Every part holds sanguinarine and related alkaloids, packed most heavily into the red sap of the rhizome, and they are toxic to people and animals alike. That sap also burns skin on contact, so wear gloves when you dig or divide, and keep cut pieces away from pets and children.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Toxic
A cat that chews the fleshy rhizome or a leaf tends to drool, vomit, and walk away from its food. The red sap is harsh on the mouth and gut, so keep cut pieces well out of reach.
Dogs Toxic
A dog that bites into a dug rhizome usually drools and looks queasy, sometimes vomiting. The bright sap irritates wherever it smears, so wash a curious nose or paw if it gets on them.
Horses Toxic
Grazing on the plant can bring colicky belly pain and a dull, off-feed horse. The same alkaloids that sting bare human skin are no gentler inside a horse.
Rabbits Toxic
A rabbit's small body handles these alkaloids poorly, and even a single nibble can leave it drooling and off its food. Treat every part of the plant as off-limits.
Livestock Toxic
Cattle, goats, and sheep usually leave the bitter foliage alone, but any animal that does eat it can suffer digestive distress from the sanguinarine.
Birds Caution
The irritant sap makes the plant a poor neighbor for pet birds, and the rhizome is best kept away from them entirely. Wild birds simply ignore it.
People Caution
No part of bloodroot is food, and swallowing it can bring burning, nausea, and vomiting. The red sap is an escharotic that damages skin, so wear gloves and keep it away from children.
Wear gloves when cutting or dividing; the red-orange sap stains and irritates skin and eyes, so avoid skin and eye contact and wash after 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
Most gardens grow the plain wild bloodroot, though a single named selection also appears in shaded beds.
Sanguinaria canadensis f. multiplex (Plena)
This double-flowered form crowds many extra petals into each bloom, layering them densely, and its sterile flowers hold on far longer than the few days a wild plant manages.
Companions
Bloodroot thrives among the other plants of the shaded woodland floor, especially ones that take over the space once it goes dormant.
Plant near
Trillium: Shares the same moist, humus-rich, shaded woodland conditions and blooms in the same spring window.
Ferns: Provide shade and cover after bloodroot goes summer dormant, filling the gap left by its dieback.
How to propagate
More bloodroot comes from one of two paths, worlds apart in the patience they ask. Cutting apart the red rhizome delivers new plants quickly. Coaxing them from fresh seed means waiting years.
DivisionModerate
Fall or early spring · 1 to 2 seasons
Splitting the rhizome is the surest way to get more plants. In fall or early spring, lift a clump and cut the red rhizome into pieces, each one carrying a growth bud, then lay them back horizontally just under the surface. Give a fresh division a season or two to settle in before it starts to spread.
SeedDemanding
Sow fresh immediately after collection in late spring/early summer · Several years to flowering
Starting from seed asks for patience. The seed must never dry out, so sow it fresh the moment it is collected in late spring or early summer. Each seed wears a fleshy elaiosome that ants carry off and plant for you in the wild, and even when everything goes right, a seedling needs several years to reach its first bloom.
Myths
You can safely dab bloodroot sap on your skin as a natural remedy to remove moles or growths.
Sanguinarine is an escharotic, meaning it burns and kills living tissue. People who have tried it on the skin have been left with deep wounds and lasting scars. The sap is a corrosive irritant, not a home remedy.