Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Asteraceae

Genus:

Cirsium

Species:

Cirsium rigidum

Growth Characteristics

Growth Habit:

Forb/herb

Height:

60 cm

Drought Tolerance:

Medium

Bloom Months:

jun,jul,aug

Bloom Colors:

pink, purple

Keystone Species Ranking

Pollen Specialist Bee Keystone:

★★★★☆ Native pollen specialist bee species supported by this genus (NWF)

Garden & Ecology Notes

Wildlife Value:

bees, butterflies, birds

Deer Resistant:

Yes

Fire Ecology:

Fire adapted — tolerates or benefits from fire

Fire Notes:

Common in post-fire meadows and disturbed montane habitats. Resprouts vigorously from taproots after fire disturbance.

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–60 days

Germination Time:

14–30 days

Notes:

Seeds benefit from cold-moist stratification and germinate best with light exposure at surface or shallow planting depth.

The above propagation data sourced from Claude AI