Slender thistle
Carduus pycnocephalus
Slender thistle is a biennial or short-lived perennial that establishes readily in disturbed soils, roadsides, and open meadows with little care. It prefers full sun to part shade and is tolerant of poor, dry soils once established. While it attracts pollinators, be aware it can self-seed prolifically and may require management to prevent unwanted spread.
Care Level
Low
Sun
Partial Sun
Water
Moderate
Growth Rate
Moderate
Mature Height
12″ – 72″
Soil
loam
Life Cycle
Perennial
Spacing
12″
Watering Schedule
Every 10-14 Days • Water Sparingly; Soil Can Dry Out Between Waterings
Soil pH
6.5 – 7
Temperature
-20° – 90°F
Mature Spread
up to 36″
Root Depth
Medium
Foliage
Medium
Propagation: Seed, Division
Native to
Attracts
Sources
Data: trefle, usda
Image: trefle.io — Taken Apr 15, 2019 by Pep Secem (cc-by-sa)
No nurseries currently have this species in stock.