Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Asteraceae

Genus:

Cirsium

Species:

Cirsium opacum

Growth Characteristics

Height:

120 cm

Drought Tolerance:

Low

Bloom Months:

jul,aug,sep

Bloom Colors:

purple, pink

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

Fire Ecology:

Fire adapted — tolerates or benefits from fire

Fire Notes:

Responds positively to fire in prairie habitats; fire helps maintain open conditions and reduce competition.

Source: deepseek-v4-flash

Propagation & Germination

Stratification:

Cold/moist stratification required — 30–60 days

Germination Time:

14–30 days

Notes:

Seeds benefit from cold moist stratification for 30-60 days to break dormancy.

Source: deepseek-v4-flash