Bloodroot (Sanguinaria canadensis) is a spring-blooming perennial woodland wildflower native to eastern North America, and it is the only species in its genus, Sanguinaria, in the poppy family. It is grown mainly for its early white flowers, and the key to growing it is cool, moist, partly shaded woodland conditions.
Grows as
Perennial
Light
Part shade, Shade
Water
Keep soil moist during spring growth; it tolerates drier conditions once dormant in summer.
Soil
Rich, humusy, well-drained woodland soil.
Temperature
Hardy in cold climates; dormant in mid to late summer.
How easy
Easy
Safety
Toxic: The red sap and rhizome contain the alkaloid sanguinarine, which can destroy skin tissue and cause scarring, and an overdose can cause vomiting and loss of consciousness if taken internally.
About
Sanguinaria canadensis, bloodroot, is a perennial, herbaceous flowering plant native to eastern North America. It is the only species in the genus Sanguinaria, included in the poppy family Papaveraceae, and is most closely related to Eomecon of eastern Asia.
Sanguinaria canadensis is sometimes known as Canada puccoon, bloodwort, redroot, red puccoon, and black paste. Plants are variable in leaf and flower shape, and have been separated as a different subspecies due to these variable shapes, indicating a highly variable species.
How to grow it
Sanguinaria canadensis is cultivated as an ornamental plant. The double-flowered forms are prized by gardeners for their large showy white flowers, which are produced very early in the gardening season. Bloodroot flower petals are shed within a day or two of pollination, so the flower display is short-lived, but the double forms bloom much longer than the normal forms. The double flowers are made up of stamens that have been changed into petal-like parts, making pollination more difficult.
The double-flowered cultivar S. canadensis f. multiplex 'Plena' has gained the Royal Horticultural Society's Award of Garden Merit.
Safety
Bloodroot produces benzylisoquinoline alkaloids, primarily the toxin sanguinarine. The alkaloids are transported to and stored in the rhizome.
Sanguinarine kills animal cells by blocking the action of Na+/K+-ATPase transmembrane proteins. As a result, applying bloodroot to the skin may destroy tissue and lead to the formation of necrotic tissue, called an eschar. Bloodroot and its extracts are thus considered escharotic. Although applying escharotic agents (including bloodroot) to the skin is sometimes promoted as a pseudoscientific home treatment for skin cancer, these attempts can be severely disfiguring. Salves, most notably black salve, derived from bloodroot do not remove tumors. Microscopic tumor deposits may remain after visible tumor tissue is burned away, and case reports have shown that in such instances tumor has recurred and/or metastasized.
Where it grows
Bloodroot is native to eastern North America from Nova Scotia to Florida, and west to the Great Lakes and down the Mississippi embayment.
Text excerpted from the Wikipedia article Sanguinaria by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.