Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Asteraceae

Genus:

Cirsium

Species:

Cirsium arizonicum var. arizonicum

Growth Characteristics

Height:

100 cm

Drought Tolerance:

Medium

Bloom Months:

apr,may,jun,jul,aug,sep

Bloom Colors:

pink, red, 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, small mammals

Fire Ecology:

Fire adapted — tolerates or benefits from fire

Fire Notes:

Resprouts vigorously from root crown following fire, common in post-fire succession in chaparral and grassland communities.

Source: Claude claude-sonnet-4-5-20250929 Batch

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–60 days

Germination Time:

14–30 days

Notes:

Seeds require light for germination; surface sow or barely cover with soil. Germination improved with cold stratification.

Source: Claude claude-sonnet-4-5-20250929 Batch