Also known as Burdock · Caucasian Burdock · Caucasian Harelock
Arctium nemorosum, a biennial herb, features large leaves and prickly burrs. It thrives in disturbed ground, woodlands, and meadows, spreading via its tenacious burrs.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Prefers full sun but can tolerate partial shade. Ample light promotes better flowering.
Moderate
50% intensity
Keep soil consistently moist when young, reduce as established. Tolerant of some dryness.
Well-drained
50% intensity
Hardy
50% intensity
Tolerates a wide range of temperatures, from cool to moderately warm. Frost hardy once established.
Low
25% intensity
Requires minimal feeding. A light balanced fertilizer in spring is usually adequate.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Non-toxic to pets and humans.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly, keeping the soil consistently moist but not waterlogged, especially during the establishment phase.
Once mature, Arctium nemorosum is quite drought-tolerant, but occasional watering will ensure robust growth and flowering. Avoid overhead watering to minimize the risk of fungal diseases.
Pruning is minimal and primarily involves removing spent flower stalks to prevent self-seeding if desired, or to maintain a tidy appearance. Dead or damaged foliage can be removed at any time.
Otherwise, this plant is best left to grow naturally.
Arctium nemorosum is easily propagated from seeds sown outdoors in autumn or early spring. The seeds require a period of cold stratification. Germination can be erratic.
It can also spread vigorously through root division, though this is less commonly practiced for garden cultivation.
Repotting is not typically necessary for Arctium nemorosum, as it is a biennial or short-lived perennial often grown as an annual. If grown in containers and it outgrows its pot, repot in early spring into a larger container with fresh, well-draining soil, but this is rare.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Arctium Nemorosum (Arctium nemorosum)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Arctium |
| Species | Arctium nemorosum |
Similar in genus Arctium
Answers based on plant encyclopedia data
