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Oenothera berlianderi 'Siskiyou' (evening primrose)

Oenothera berlianderi 'Siskiyou'

evening primrose or syn: Oenothera speciosa

An extremely long blooming, easy care plant. A vigorous, stoloniferous grower that can be a bit of a thug, especially in sandier soils. It is less invasive and shorter than O. speciosa, but still a fast running plant that can quickly spread. Great numbers of 1-1/2", upright, clear light pink flowers are translucent in the sun. Blooms May through July and with periodic rebloom until October.

Oenothera berlandieri 'Siskiyou' - 72 per flat Availability
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10-12 Inches


12-24 Inches


12-24 Inches

Bloom Color


USDA Hardiness Zone 5-9

evening primrose Interesting Notes

Oenothera comes from the Greek "Oïnos", wine and "ther", wild animal. For the Ancients, it designated a plant whose roots, soaked in wine, and would have enabled them to tame wild beasts. With many varieties to choose from, these plants will bloom almost 24 hours a day.

Sundrops are easily grown in average, medium moisture, well-drained soils in full sun. They prefer heat and dryish soils. They will tolerate poor soils, light shade and some drought. Although sundrops tolerate poor soils, they do better when the soil is supplemented with organic material. Sundrops will grow in partial shade, but flowers best in the more sunny spots. Once a popular pass-along in old fashioned gardens, sundrops are enjoying a renaissance with the growing popularity of native plants and wildflowers.

Moths pollinate the flowers, particularly Sphinx moths. Other occasional visitors include the Ruby-Throated Hummingbird, honeybees and bumblebees. The insects seek nectar, although some of the bees collect pollen. - The Botanical Gardens at Asheville

According to the following German saying of the 18th century, "a pound of the root of evening primrose gives more strength than a quintal of beef", the root of evening primrose was thought to be very nutritive. The Amerindians used it differently: they used it to rub their moccasins before hunting, to mask their smell and get closer to the animals. One of the magic powers of evening primrose was actually to make hunters lucky.

Oenothera berlandieri is native to Texas and New Mexico.

Oenothera berlianderi 'Siskiyou' Growing and Maintenance Tips

Grow in full sun and average to dry soil with good drainage. Water well on planting and regularly until established. Drought tolerant. Plant this primrose where its aggressive nature will be appreciated.

Key Characteristics & Attributes

Full Sun
Full Sun
Deer Resistant
Deer Resistant
Drought Tolerant
Drought Tolerant
Early Spring
Early Spring

Additional Information

Soil Moisture Needs
Green Infrastructure
Green Roof
Plug Type
Horticultural Plug
Native to North America
Season of Interest (Flowering)
Late Spring / Early Summer
Propagation Type