Asarum caudatum aka Wild Ginger

Asarum caudatum is an evergreen perennial in the Aristolochiaceae family. Common names include western wild ginger and long-tailed ginger. Its native range runs from British Columbia to California. It also grows in Idaho and western Montana. It lives beneath conifers in moist woods, including redwood forests. There it can form a thick cover beneath trees.

In gardens, plants reach about 0.5 feet (0.15 m) tall. Clumps spread to about 1.5 feet (0.46 m) or more. RHS gives broader upper sizes of 1.6 feet (0.5 m) tall and 3.3 feet (1 m) wide. Rhizomes let the plant spread into a low mat. The bright green leaves have a glossy, heart-shaped blade. They grow in pairs on long, thin leaf stalks. Each blade spans about 0.3–0.5 feet (0.10–0.15 m). Crushed leaves give off a spicy ginger scent.

Small, hairy, cup-shaped flowers grow close to the ground. The leaves often hide them from view. Their colours range from rusty brown through brownish purple to yellow-green. Bloom runs from April to June. Plants also set seed and may sow themselves nearby. Ants carry some seeds to new sites. Gardeners grow this plant chiefly for its lasting leaf cover. It suits shaded borders, rock gardens, and woodland beds. The evergreen leaves also give the garden winter interest.

Give it partial or full shade and loose, humus-rich soil. Neutral to slightly acid soil suits it well. Keep the soil moist, but allow excess water to drain. Some dappled morning sun can suit the plant. Established clumps tolerate some drought, though they prefer steady moisture. Hot, humid summers in the deep South can cause poor growth. Missouri Botanical Garden lists USDA zones 7–10. RHS rates its hardiness H6. Divide clumps to make new plants; pruning is not needed.

Few serious pest or disease problems occur, but watch for rust. Slugs and snails may feed on plants. Some slug resistance and deer resistance are also reported. PFAF records root use as a flavouring and leaves for tea. It also records traditional medicinal uses. These reports do not establish that eating the plant is safe. RHS warns that eating it can poison people and pets. Treat it as an ornamental, not a food plant.