Symphytum orientale aka White Comfrey

Symphytum orientale is known as white comfrey or soft comfrey. This perennial belongs to the borage family, Boraginaceae. Its native range runs from southeast Bulgaria to western Türkiye. It also extends from Ukraine to the Caucasus. It grows in temperate regions and is not native to Britain or Ireland. Recorded habitats include hedgerows, small woods, roadsides, and railway margins. It also grows on waste ground and can become naturalised.

The plant forms clumps with soft hairs and dark green leaves. The leaves are oblong, with a wrinkled surface. It loses its leaves for winter. Plants reach about 1.3–2 feet (0.4–0.6 m) tall. The RHS size table gives a slightly lower upper height. Its listed spread reaches about 1.6 feet (0.5 m). Clusters of white flowers hang down from the plant. Each flower has a tube that widens into a funnel. Flowering falls in late spring and early summer.

Grow white comfrey in sun or partial shade. It needs moist soil that drains well, with moderate fertility. The RHS lists loam, clay, and chalk as suitable soils. It accepts acid, neutral, and alkaline conditions. A sheltered site suits its listed growing needs. The RHS rates its hardiness as H6. Plants For A Future lists USDA zones 3–9. Plants take about two to five years to reach full size. Growers can raise plants from seed, division, or root cuttings.

White comfrey suits cottage gardens, informal beds, and wildlife gardens. It grows fast and produces plenty of leafy material. Plants For A Future describes using the leaves in compost. Wilted leaves can also serve as mulch or crop feed. Soaked leaves provide a liquid feed for crops. Repeated cutting supplies more material during the year. Routine pruning is not needed, though old leaves can be trimmed. The RHS reports few pest or disease problems. It seeds freely and may become a nuisance. Its spread poses less risk than some other comfreys.

Plants For A Future records no known food or medicinal uses. The plant contains toxic alkaloids that can harm the liver. Roots hold the highest levels, and leaf levels rise with age. Repeated eating can harm people, rabbits, and rodents. Reported symptoms include stomach pain, vomiting, and loss of appetite. The RHS advises gloves and other protection when handling it.