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PlantSnap
Plant Care
Spear thistle
(Cirsium vulgare)
Also Known As
Spear thistle, Common thistle, Bull thistle, Welted thistle, Hard thistle
About This Plant
Cirsium vulgare is a biennial or perennial herbaceous plant species that has purple or pink flowers and is commonly known as Bull thistle. It is a member of the Asteraceae family and is native to Europe and Asia.
Plant Care Instructions
Outdoor Size Range
24-72 inches (60-180 cm)
Light Requirements
Cirsium vulgare prefers full sun but can tolerate partial shade.
Humidity Needs
Cirsium vulgare does not have any specific humidity requirements.
Fertilizing Schedule
Cirsium vulgare does not require fertilizer, but if you want to encourage growth, you can use a balanced fertilizer once a month during the growing season.
Pruning Guidelines
Regular pruning can help control the size of the plant and prevent it from becoming too invasive. It is best to prune in the fall after the plant has finished flowering.
Common Pests and Diseases
Common pests and diseases for Cirsium vulgare include aphids, spider mites, and powdery mildew.
Indoor Size Range
N/A
Watering Schedule
This plant species requires moderate watering, and the soil should be kept moist but not waterlogged.
Temperature Range
This plant species can tolerate a wide range of temperatures, from -40°F (-40°C) to 100°F (38°C).
Growing Season
The growing season for Cirsium vulgare is from late spring to early fall.
Growing Difficulty Level
Cirsium vulgare is relatively easy to grow and maintain.
USDA Hardiness Zones
Cirsium vulgare can grow in USDA hardiness zones 3 to 9.
Did You Know?
Cirsium vulgare is considered a noxious weed in many parts of the world, including the United States, where it is an invasive species.
