common evening-primrose
Oenothera biennis
What it is
Common evening-primrose is a biennial plant that typically grows in disturbed soils and open areas. It is known for its bright yellow flowers that open in the evening and close the following morning, attracting nocturnal pollinators.
Where and when to find it
- Habitat
- Roadsides, fields, waste areas, and open woodlands.
- How to find it
- Look for its tall stem and yellow flowers in sunny, open spots. If you visit at dusk or dawn, you might catch the flowers opening or closing!
- Best time of day
- Evening or early morning
- Best season
- Summer to early fall
How it lives
- What it eats
- It makes its own food from sunlight, water, and air.
- What eats it
- Moths and other nocturnal insects drink its nectar, and some animals might nibble on its leaves or seeds.
Worth knowing
- Evening-primrose is sometimes called 'King's Cureall' because of its traditional uses.
- The plant gets its name 'evening-primrose' because its flowers open in the evening.
- Its seeds are a good source of oil that is used in some medicines.
- The flowers usually only last for one night!
- It has a long taproot, which helps it find water deep in the soil.
Why it matters
Evening-primrose provides nectar for moths and other nighttime creatures when many other flowers are closed. Its seeds also provide food for birds.