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Pest Information

Hooker's Evening Primrose

Hooker's Evening Primrose

  • Latin Name: Oenothera Hookeri
  • Common Name: Hooker's Evening Primrose
  • Other Names: N/A

Pest Details

Hooker's Evening Primrose


Native to the United States.


A biennial or short-lived perennial. Most likely to be found in moist areas such as roadside ditches and ditch banks. Occasionally also occurs in orchards and vineyards where non-tillage management is used. Seeds germinate from early spring to early summer and the plants mature throughout the summer.


Mature plants can grow up to 6 feet tall, with erect, thick, reddish stems with very few branches. The bright yellow flowers are large – over 2 inches wide – and are borne on the tips of the branches. Leaves along the base and stem are up to 8 inches long and lance-shaped. Leaves that grow just below the flowers tend to be much smaller and more bract like.

Characteristicts Important to Control:

Not a big problem, and tillage of soil may control it.

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