Harelock (Arctium nemorosum)

Harelock

Also known as: Northern burdock

Harelock, also known as burdock, can be found around the world. The roots can be eaten and have been used to make soft drinks and tea. Harelock's hooked spines were reportedly the inspiration for the invention of Velcro.

Scientific classification

Species

Harelock (Arctium nemorosum)

Asters bellflowers fanflowers and allies

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Biennial

Lifespan

1 m to 2.5 m

Plant Height

2.5 cm to 4.5 cm

Flower Size

Purple, Brown

Flower Color

Deciduous

Leaf type

20 - 35 ℃

Ideal Temperature

Distribution of Harelock

Distribution Map

Harelock is naturally found across a broad swath of the temperate zones in Europe, including both Central and Eastern regions. Its range extends to select parts of Northern and Southern Europe, encompassing major regions rather than being confined to specific localities, and reflecting a wide adaptability to diverse European climates and habitats.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Broad-leaved forests, forest glades, coppices, waterside alder thickets, roadsides

Care Guide for Harelock

Every week

Water

20 - 35 ℃

Ideal Temperature

Water: Originating from woodlands, harelock prefers consistently moist soil and shows moderate drought tolerance. Weekly watering is essential, and natural rainfall during the growing season greatly benefits this herbaceous plant commonly grown outdoors.

Fertilize: For harelock, use balanced fertilizers during spring and summer to encourage growth. Apply high-nitrogen monthly with caution to avoid root burn. Reduce frequency in cooler months, adjusting based on growth cycles. Follow guidelines for dosage and ensure thorough watering post-application to protect roots.

Pruning: Harelock displays large flower heads and broad leaves. Prune in early to late spring for healthy growth, removing dead stems and crowded areas to enhance air circulation. Use clean, sharp tools and avoid wet conditions to reduce disease risk and improve appearance.

Propagation: Harelock is a biennial with large leaves and purplish thistle-like flowers. Propagation is best done by sowing seeds in well-draining soil, ensuring they are shallowly sown and kept moist. Transplant seedlings when sturdy, providing space for root development and monitoring for pests.

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