Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Asteraceae

Genus:

Cirsium

Species:

Cirsium rydbergii

Growth Characteristics

Life Cycle:

Perennial

Growth Habit:

Forb/herb

Height:

8-12 ft

Light Requirements:

Full Sun

Drought Tolerance:

Medium

Bloom Months:

may, jun, jul, aug, sep

Bloom Colors:

White, Pink, Purple

Native Range

United States: Arizona, Utah

Keystone Species Ranking

Bee Keystone:

★★☆☆☆ Based on number of native bee species using this genus for pollen and nectar (Source: National Wildlife Federation)

Soil Requirements

Soil Type:

moist, well-drained loamy soil

pH:

6.0 - 7.5 (slightly acidic to neutral)

Drainage:

good drainage required

Moisture:

consistently moist

Notes:

prefers riparian or wetland areas

Germination Information