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PlantSnap
Plant Care
Woolly thistle
(Cirsium eriophorum)
Also Known As
Woolly thistle, Eriophorum thistle, Woolly-headed thistle
About This Plant
Cirsium eriophorum is a species of flowering plant in the family Asteraceae. It is a biennial or perennial herbaceous plant that can grow up to 3 feet (91 cm) tall. The leaves are lanceolate, with spiny edges and covered in fine hairs. The flowers are pink to purple and appear in clusters at the top of the stems.
Plant Care Instructions
Outdoor Size Range
Up to 3 feet (91 cm)
Light Requirements
Cirsium eriophorum requires full sun to partial shade. It can tolerate some shade but may not flower as well.
Humidity Needs
Cirsium eriophorum does not have specific humidity requirements, but it prefers moderate to high humidity levels.
Fertilizing Schedule
Fertilize the plant once a month during the growing season with a balanced fertilizer.
Pruning Guidelines
Remove spent flowers to encourage new growth and prevent self-seeding. Cut back the plant in late fall or early spring to promote bushier growth.
Common Pests and Diseases
Cirsium eriophorum is relatively pest-free, but it may be susceptible to aphids and spider mites.
Indoor Size Range
Not suitable for indoor growth
Watering Schedule
Water the plant regularly, keeping the soil moist but not waterlogged. During periods of drought, increase watering.
Temperature Range
Cirsium eriophorum can tolerate a wide range of temperatures, from -40°F (-40°C) to 100°F (38°C).
Growing Season
Cirsium eriophorum grows in the summer and fall.
Growing Difficulty Level
Cirsium eriophorum is moderately difficult to grow, as it requires specific growing conditions and can be prone to pests.
USDA Hardiness Zones
Cirsium eriophorum is hardy in USDA zones 3 to 8.
Did You Know?
The woolly thistle is the national flower of Scotland.
