Vegetable Burdock
Arctium lappa 'Shirohada'

Family: Asteraceae (ass-ter-AY-see-ee)
Genus: Arctium (ARK-tee-um)
Species: lappa (LAP-uh)
Cultivar: Shirohada

Category
Vegetables
Herbs

Height
18-24 in. (45-60 cm)

Spacing
3-6 in. (7-15 cm)
18-24 in. (45-60 cm)

Hardiness
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)

Sun Exposure
Full Sun
Sun to Partial Shade

Danger

Bloom Color

Bloom Time
Late Spring/Early Summer
Mid Summer

Foliage
Velvet/Fuzzy-Textured

Other details
Average Water Needs; Water regularly; do not overwater
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information

Propagation Methods
From seed; direct sow outdoors in fall
From seed; direct sow after last frost

Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored