Eric Hunt / CC BY-SA 4.0
Bloodroot
Sanguinaria canadensis
Overview
One of the first spring wildflowers to emerge in eastern North American woodlands, bloodroot opens its pristine white petals for just a day or two before scattering. Named for the bright red-orange sap in its rhizomes, this plant was used extensively by Native Americans as a dye and ceremonial pigment. It is toxic if ingested but has a fascinating history in herbal medicine under professional guidance.
Growing Conditions
How to Grow Bloodroot
Bloodroot (Sanguinaria canadensis) is a perennial tree that grows to about 8 inches tall and 12 inches wide.
To grow bloodroot, give it full sun. It is hardy across USDA hardiness zones 3–6. Plant it in rich, moist, humusy woodland soil with leaf litter, at a slightly acidic pH of 5–6.5. It does best with even, moderate watering.
Exact sowing, transplanting, and harvest months shift by climate zone — the planting calendar below lays them out for cool through hot regions. Its white flowers appear from May through July, offering moderate value to pollinators. Once its roots take hold, it asks little of you.
Companion Planting & Soil
Bloodroot grows well alongside trillium, virginia bluebells, hepatica, and jack-in-the-pulpit.
Good Companions
Planting Calendar
When to sow, transplant, and harvest by growing zone.
| Zone | Action | Months | Notes |
|---|---|---|---|
| Cold (1-2) | Transplant | Sep — Oct | Plant rhizomes 1" deep in fall; toxic orange sap — handle with gloves |
| Cold (1-2) | Bloom | Apr — May | Brilliant white flowers last only 1-2 days; each leaf wraps a single flower bud |
| Cool (3-4) | Transplant | Sep — Oct | Fall planting; rich, moist woodland soil; spreads slowly by rhizome |
| Cool (3-4) | Bloom | Mar — May | Very early spring bloom; native bee magnet; ant-dispersed seeds |
| Moderate (5-7) | Transplant | Oct — Nov | Fall plant in shade; ephemeral — foliage gone by midsummer |
| Moderate (5-7) | Bloom | Mar — Apr | Fleeting spring bloom; pairs beautifully with hepatica |
Uses
Medicinal & Folk Use
In herbal and folk tradition, it has been valued in several ways: sanguinarine compound used in some dental products for plaque control; historical topical use for skin growths (under professional guidance only); traditional Native American remedy for respiratory conditions. These are traditional uses, not medical advice.
Beyond the Garden
Bloodroot earns its keep past the plate, too: beautiful native woodland garden specimen; natural red-orange dye from rhizome sap; important early-spring pollinator resource.
Safety Notes
This species contains many alkaloids and is poisonous in large doses. This herb should not be used by women when they are pregnant or lactating. The sap, fresh or dried, can cause intense irritation to the mucous membranes.
