Taxonomy

Division:

Magnoliophyta | - Flowering plants

Family:

Asteraceae

Genus:

Cirsium

Species:

Cirsium pitcheri

USDA Symbol:

CIPI

Growth Characteristics

Life Cycle:

Biennial

Growth Habit:

Forb/herb

Height:

100 cm

Light Requirements:

Full Sun

Drought Tolerance:

High

Bloom Months:

jun,jul,aug,sep

Bloom Colors:

cream, white, pink

Wildlife Benefits

Bees:

★☆☆☆☆ Documented bee visitation (GBIF)

Butterflies & Moths:

★☆☆☆☆ Documented Lepidoptera association (GBIF)

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

Salt Tolerant:

Yes

Soil Requirements

Soil Type:

sandy, nutrient-poor, well-drained soil

pH:

6.0 - 7.5 (slightly acidic to neutral)

Drainage:

excellent drainage required

Moisture:

dry to moderate

Notes:

native to Great Lakes dunes and sandy shores

Propagation & Germination

Stratification:

Cold/moist stratification required — 60–90 days

Germination Time:

14–42 days

Notes:

Seeds require cold stratification. Best sown in fall for natural stratification or cold-treated before spring sowing.

The above propagation data sourced from Claude AI