Cirsium Species, Dwarf Thistle, European Stemless Thistle
Cirsiumacaule

Family: Asteraceae (ass-ter-AY-see-ee)
Genus: Cirsium (SIR-see-um)
Species: acaule (a-KAW-lee)

Category
Groundcovers
Perennials

Water Requirements

Sun Exposure
Full Sun
Sun to Partial Shade
Light Shade

Foliage
Herbaceous

Foliage Color

Height
under 6 in. (15 cm)

Spacing

Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)

Where to Grow

Danger
Plant has spines or sharp edges; use extreme caution when handling

Bloom Color
Lavender

Bloom Characteristics

Bloom Size

Bloom Time
Late Summer/Early Fall

Other details
May be a noxious weed or invasive

Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)
8.6 to 9.0 (strongly alkaline)
over 9.1 (very alkaline)

Patent Information

Propagation Methods
From seed; direct sow outdoors in fall

Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds