trefle.io · Taken May 28, 2019 by pascal peyrache (cc-by-sa)
Brassicaceae
Dyer's woad
Isatis tinctoria
Also known as Woad, Glastum, Asp of Jerusalem, Isatis tinctoria var. pastoris
Native Plants · Dyer'S Woad · Dye Plant · Historic · Medicinal · Brassicaceae · Yellow Flowers · Pollinator · Biennial · Invasive Potential · Heritage Plant
Dyer's woad is a historic dye plant with bright yellow flowers that attract pollinators, best grown in a sunny to partly shaded spot with average, well-drained soil. Water regularly during the growing season and deadhead spent flowers promptly, as it can self-seed prolifically. Note that this plant is considered invasive in parts of North America, so check local regulations before planting.
Growing conditions
The details behind the basics
- Daily light
- 5 hours
- Watering
- Water evenly to keep soil consistently moist but not waterlogged · Every 7-10 days
- Maintenance
- Moderate
- Soil
- loam
- Soil pH
- 7.5–8
- Temperature
- -20°F to 90°F
- Cycle
- Perennial
- Propagation
- Seed, Division
Hardiness
USDA 4a-9b
Form & growth
Mature size and habit
- Mature height
- 12 in – 3 ft
- Spread
- 2 ft
- Spacing
- 12 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- No
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Afghanistan, Albania, Algeria, Amur, Austria, Baltic States, Belarus, Belgium, British Columbia, Bulgaria, California, Canary Is., Central European Rus, Chile Central, China North-Central, China South-Central, China Southeast, Colorado, Corse, Czechoslovakia
- Attracts
- Bees, Butterflies
Sources: trefle, usda
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