Oenothera biennis - Evening Primrose - Karan A. Rawlins, University of Georgia, Bugwood.org

Evening Primrose

Oenothera biennis

Also called Evening Star, King's cure-all

  • Fragrant yellow saucer-shaped flowers appear on tall stalks
  • Blooms open at dusk and closing by noon the following day
  • Lance-shaped, slightly serrated, mid-green leaves
  • Biennial, self-seeding perennial
  • Flowers form on second year's growth
  • Bloom Time: June to September
  • Flower Size: 2.5 cm

ZONE:
4

COLOUR:
Yellow

HEIGHT:
100-150 cm

SPREAD:
30-45 cm

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Growing and Maintenance Tips:


Thrives in full sun with average moisture in a somewhat sandy soil. Can be found along roadsides, in abandoned fields, slopes, vacant lots and ditches. 

Additional Notes about Evening Primrose:


Native to Ontario

Its roots during the first year of growth are edible and the seeds are important as bird feed. Seeds can remain viable in the soil for up to 70 years.

Characteristics & Attributes


GROWTH RATE:
Medium
FLOWERING TIME:
Summer
Lt. Sum-Fall
Lt. Spr-Sum
HABIT:
Upright
Clumping
FOLIAGE COLOR:
Green