Northern Evening Primrose

Oenothera parviflora

Northern Evening Primrose

Frank Mayfield from Chicago area, USA

Taxonomy

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

Growth Characteristics

Life Cycle:
Biennial
Growth Habit:
Forb/herb
Height:
4-6 ft
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
jun, sep
Bloom Colors:
Yellow

Native Range

United States: Connecticut, District of Columbia, Delaware, Iowa, Illinois, Indiana, Kentucky, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, North Carolina, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Virginia, Vermont, Wisconsin, West Virginia, Canada: British Columbia, Manitoba, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, Quebec, 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:
5.5 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
thrives in disturbed, open areas

Germination Information

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

Notes: Seeds require cold-moist stratification for 30 days before germination.

Source: OpenAI GPT-4o