Creeping Comfrey

Symphytum grandiflorum, known as creeping comfrey or running comfrey, is a compact, evergreen perennial herb in the borage family, native to the Caucasus region. It produces smaller leaves than Russian comfrey and spreads via creeping rhizomes rather than seed, making it tidy and manageable as a ground cover or border plant. Its tubular purple flowers attract pollinators, and the plant is highly valued as a mineral accumulator, mulch crop, and support plant in forest gardens and orchards. Hardy in USDA zones 5–8, it tolerates deer, shade, and competition from other plants.

Growing

Establish from divisions of creeping rhizomes or from nursery plants rather than seed. Plant divisions at a depth where the crown sits just at soil level, spacing plants 45 cm apart. Place in a partially shaded to shaded position with moist, well-drained soil. New growth will emerge once soil temperatures are reliably above 10 °C. Position plants deliberately, as established clumps are difficult to remove entirely — rhizomes left behind will regrow.

Care

Water regularly during the first growing season to support establishment; once established, creeping comfrey is largely self-sufficient and tolerates dry shade. No feeding is required — the plant accumulates its own minerals. Cut back foliage several times per growing season to use as mulch or liquid feed; the plant regrows quickly after each cut. Do not allow poultry free access until plants are well established, as they will graze young plants to the ground.

Harvest

Harvest leaves and stems once the plant is well established, cutting near the base with a sharp knife or shears. The plant can be cut multiple times per growing season; harvest when foliage is lush and before flowering for maximum biomass. Rhizome divisions for propagation can be taken at any time the ground is workable and frost-free, splitting off sections with a spade.

In the kitchen

Creeping comfrey is primarily a garden utility plant rather than a culinary herb. Its leaves are used to make nutrient-rich liquid fertiliser teas by submerging cut foliage in water. Chopped leaves make excellent compost activators and direct surface mulch around fruit trees and vegetables, releasing potassium, nitrogen, and phosphorus as they break down.

Storing

Freshly cut comfrey leaves are best used immediately as mulch or steeped for liquid feed. For fertiliser tea, pack leaves into a sealed container, submerge in water, and allow to ferment for 3–6 weeks; store the diluted liquid feed at ambient temperature and use within the season.