Whitestem Milkweed

Asclepias albicans

Whitestem Milkweed

NPS

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Apocynaceae
Genus:
Asclepias
Species:
Asclepias albicans

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Shrub , Subshrub
Height:
8-12 ft
Light Requirements:
Full Sun
Bloom Months:
mar, apr, may, jun
Bloom Colors:
White, Yellow
Landscaping Shrub:
Yes

Native Range

United States: Arizona, California

Keystone Species Ranking

Caterpillar Keystone:
★★★★☆ Based on number of butterfly and moth species using this genus as host plant (Source: National Wildlife Federation)

Host Plant for Caterpillars

Queen butterfly (Danaus gilippus)

Soil Requirements

Soil Type:
sandy, well-drained, nutrient-poor soil
pH:
6.0 - 8.0 (neutral to slightly alkaline)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
native to arid desert regions

Germination Information

Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).; then Cold-moist stratification for 60 days.

Source: OpenAI GPT-4o