Rough star thistle
Centaurea aspera
Rough star thistle is a sun-loving Mediterranean perennial that is extremely easy to grow in poor, well-drained soils and tolerates dry spells once established. Plant it in a full-sun border or wildflower meadow where it will produce spiny, attractive flower heads beloved by pollinators. Minimal care is needed — avoid overwatering or rich soils, which can cause floppy growth.
Care Level
Low
Sun
Full Sun
Water
Moderate
Growth Rate
Moderate
Mature Height
12″ – 36″
Soil
loam
Life Cycle
Perennial
Spacing
18″
Watering Schedule
Every 10-14 Days • Water Sparingly; Allow Soil To Dry Completely Between Waterings As This Plant Tolerates Dry Conditions Well
Soil pH
7 – 7.5
Temperature
-20° – 90°F
Mature Spread
up to 24″
Root Depth
Medium
Foliage
Medium
Propagation: Seed, Division
Native to
Attracts
Sources
Data: trefle, usda
Image: trefle.io — Taken Jun 24, 2017 by Henk Van Lottum (cc-by-sa)
No nurseries currently have this species in stock.