Nuttall's Evening Primrose

Oenothera nuttallii

Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Onagraceae
Genus:
Oenothera
Species:
Oenothera nuttallii

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb
Height:
3-4 ft
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
jun, jul, aug
Bloom Colors:
White

Native Range

United States: Colorado, Illinois, Kansas, Michigan, Minnesota, Montana, North Dakota, Nebraska, South Dakota, Utah, Wisconsin, Wyoming, Canada: Alberta, Manitoba, Ontario, Saskatchewan

Keystone Species Ranking

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

Host Plant for Caterpillars

Primrose Moth (Schinia florida)

Soil Requirements

Soil Type:
sandy, well-drained, nutrient-poor soil
pH:
6.0 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
Common in prairies and open woodlands

Germination Information

Pre-treatment: Single-step cold-moist stratification for temperate woodland species. for 60–120 days

Source: OpenAI GPT-4o