Oenothera speciosa 'Siskiyou' Evening Primrose



Oenothera speciosa 'Siskiyou' produces 2" pink, cup-shaped flowers most of the early summer. Also called Evening Primrose or Pinkladies, Oenothera 'Siskiyou' blooms are open during the day. 'Siskiyou' is a rapidly spreading perennial plant that makes a deciduous ground cover, but it should be contained as it is very aggressive. Plants spread both by rhizomes and by seed.

Oenothera speciosa is native to much of the United States, excepting the northern tier from Washington and Oregon to Maine and parts of the Rocky Mountains. It is naturally found in rocky prairies and plains, but is also commonly seen in fields, waste areas, roadsides and other disturbed areas.

Oenothera speciosa 'Siskiyou' prefers full sun and average to poor, well-drained soil. It it very tolerant of hot sites and infertile, dry soils.


  • Common Names: Pink Evening Primrose, Pinkladies
  • Zones: 5-8
  • Light Requirements: Full Sun to Light Shade
  • Soil Preference: Prefers dry to average, well-drained soil
  • Height at Maturity: 12-18
  • Width at Maturity: 24-36
  • Bloom Color: Pink
  • Bloom Time: Late spring to middle summer

Special Features

  • Attracts: Butterflies.
  • Tolerates: Rabbits. Drought. Juglone.
  • Other Features: Native to North America.

Care and Growing Tips

Check out our blog for more gardening tips!

Shipping Info

Spring 2023 Shipping Schedule:

Zones 9, 10: Starting Mon. March 20th
Zone 8: Starting Mon. March 27th
Zone 7: Starting Mon. April 3rd
Zone 6: Starting Mon. April 17th
Zone 5: Starting Mon. May 1st
Zones 2, 3, 4: Starting Mon. May 8th

If you'd like to receive your plants now, you can request it in the 'shipping requests' box on the order or email us. (Please note that we will not ship dormant plants, and we do not offer any sort of guarantee for plants overwintering.)

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We ship via UPS & USPS (the Post Office), and their ship rates are automatically generated through our site. We do not profit on shipping costs. We are working with these providers to get our customers the best rates possible.

All ship times are subject to change if extreme weather conditions are present here at the nursery or at the shipping destination.

Please note: Depending on the time of year, the foliage of the plants may be trimmed to fit into our shipping boxes. This could delay the flowering of the plant, but many perennials actually benefit from being cut back.

We are currently not able to ship to Puerto Rico, Hawaii, and outside of the US.