Oenothera speciosa Siskiyou (Evening Primrose)

Compact and floriferous, Oenothera speciosa ‘Siskiyou’ (Evening Primrose) is a neat perennial featuring masses of large, 2 in. across (5 cm), saucer-shaped, rose-pink flowers adorned with a white center and a greenish yellow throat.

Compact and floriferous, Oenothera speciosa 'Siskiyou' (Evening Primrose) is a neat perennial featuring masses of large, 2 in. across (5 cm), saucer-shaped, rose-pink flowers adorned with a white center and a greenish yellow throat. They rise on erect to sprawling stems atop rosettes of oblong to lance-shaped, toothed, medium green leaves. Blooming profusely from late spring to midsummer, the flowers open in the evening and remain open until late morning. They are followed by oval seed capsules bearing 4 papery wings, ready to be blown out by the wind. The trailing habit and drought tolerance of this Evening Primrose makes it perfect for rock gardens.

  • Grows up to 6-8 in. tall (15-20 cm) and 12-15 in. wide (30-37 cm).
  • Best in full sun in average, dry to medium moisture, well-drained soils. Tolerates poor soils, drought and light shade.
  • Great choice for prairies and meadows, wildflower gardens, coastal gardens or naturalized areas. May be planted in beds, borders or rock gardens. Makes a perfect full sun groundcover with its showy flowers.
  • Easily grown from seed sown outdoors in fall or early spring.
  • No serious insect or disease issues. Deer resistant.

Requirements

Hardiness 4
– 9

Heat Zones 1
– 8

Climate Zones 2B, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, H1, H2
Plant Type Perennials
Plant Family Oenothera – Primroses – Sundrops
Exposure Full Sun
Season of Interest Spring (Late)Summer (Early,Mid)
Height 6"
– 8"
(15cm
– 20cm)
Spread 1'
– 2'
(30cm
– 60cm)
Spacing 16″
– 18″
(40cm
– 45cm)
Water Needs Low
Maintenance Low
Soil Type Chalk, Loam, Sand
Soil pH Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Showy
Tolerance Deer, Drought, Dry Soil, Rocky Soil
Attracts Birds
Garden Uses Beds and Borders, Ground Covers
Garden Styles Coastal Garden, Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow