Arctium minus Seeds | Lesser Burdock

Small purple burr heads of Lesser Burdock (Arctium minus) on a branching stem — Lesser Burdock (*Arctium minus*): Asteraceae, the common burdock of European hedgebanks and pasture margins.

LATIN NAME: Arctium minus

COMMON NAME: Lesser Burdock

Plant Profile

Lesser burdock is the common burdock of hedgerows, waste ground, tracks and pasture margins across Europe, and it has followed settlement to North America, South America and Australasia. It is a biennial, forming a broad rosette of heart-shaped, grey-downy leaves in its first year, then a branching stem half a metre to two metres tall with small purple flower heads set in hooked burrs.

The heads are stalked and arranged in a raceme, not in the flat cluster of woolly burdock, and the leaves are green rather than white beneath. The burrs ripen in late summer and are the plant’s main means of travel, catching in wool, hair and feathers.

Science & Biotechnology

Much of the research on lesser burdock comes from agricultural science, where it is studied as a pasture and crop weed that spreads by burrs catching on stock and machinery. Work on the genus has also examined the root’s inulin, a fructose polymer used as a prebiotic fibre, and the bitter compounds that give burdock its diuretic and diaphoretic reputation.

The species is a host of several rust fungi, which have been considered as a biological control option in its introduced range. Studies of its seed bank show that seed can remain viable in soil for several years, which is why cleared ground often reverts to burdock after disturbance.

Uses & Benefits

The root is the part most used: it is a traditional vegetable in Japan, where cultivated greater burdock is grown for the purpose, and a well-known herb in European and Chinese practice. The seed, known as niu bang zi in Chinese medicine, is used for sore throat and skin complaints.

In practice, most gardeners meet lesser burdock as a weed, and its burrs are the main reason it is disliked, since they mat into wool and hair. The young stems can be peeled and eaten in spring, and the pith was once used as a poor man’s sweet.

The burrs were once used to card wool, and the practice survives in a few craft workshops.

Growing from Seed

Sow in autumn or after four weeks of cold stratification, five millimetres deep, at 15-20C. Germination is usually reliable and fast. The plant is a biennial, so it needs a full season to build its rosette before it flowers. Water the rosette in dry spells during its first summer.

It will self-seed freely afterwards, and the burrs are best removed before they dry. It tolerates most soils, including poor and compacted ground, and grows best in sun. Dig out the taproot rather than cutting the top if you are trying to remove it, since the crown will resprout. Seed sown in spring will flower the following summer, not in the same year.

Our Take

Lesser burdock is a weed with a long medicinal record, and most gardeners will meet it as an invader rather than a crop. If you grow it, cut the heads before the burrs ripen.

Herb Seeds