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Hooker's Evening Primrose
Oenothera elata ssp. hookeri
  
About Hooker's Evening Primrose (Oenothera elata ssp. hookeri) 10 Nurseries Carry This Plant Hooker's Evening Primrose (Oenothera elata ssp. hookeri) is a native perennial herb in the Onagraceae (Evening Primrose) family that grows primarily along the coast between San Francisco and San Diego and northern Baja. It is fast growing and moderately long-lived. It grows in an upright form to a height of 5 feet, with active growth during the summer. Flowers are yellow and striking, and bloom in the late summer. Leaves are medium green and deciduous. Its form may be either upright or sprawling. It tends to grow in moist places, at elevations from sea level to 7,000 feet where it is a pioneer species. However, it is also somewhat drought-tolerant in garden situations. In the wild it is usually crowded out over time by more woody trees or shrubs. It spreads by prolific seed production, which also makes it attractive to many seed-eating birds.
Plant Description
Plant Type
Plant Type
Perennial herb

Size
Size
5 ft tall
5 ft wide

Form
Form
Upright, Spreading

Growth Rate
Growth Rate
Fast

Dormancy
Dormancy
Winter Deciduous

Fragrance
Fragrance
None

Flower Color
Flower Color
Yellow

Flowering Season
Flowering Season
Summer, Fall

Wildlife Supported
 
Native bees, lined sphinx moth, birds, butterflies

Landscaping Information
Sun
Sun
Part Shade, Full Sun

Moisture
Moisture
Low, Moderate - High,

Summer Irrigation
Summer Irrigation
Max 1x / month once established

Nurseries
Nurseries

Ease of Care
Ease of Care
Very Easy

Cold Tolerance
Cold Tolerance
Tolerates cold to 35° F

Soil Drainage
Soil Drainage
Fast, Medium, Slow

Soil Description
Soil Description
Adaptable to a variety of soil types, but does best in moist areas.. Soil PH: 4 - 7

Companion Plants
Companion Plants
Hooker's primRose can reseed vigorously, so be aware when planting it nearby other flowering plants. Taller plants, however, can out-compete. Consider using White Brodeiaea (Triteleia hyacinthina) or the Pitkin Marsh Lily (Lilium pardalinum ssp. pitkinense).

Maintenance
Maintenance
Host to the bacteria Xylella fastidiosa.

Propagation
Propagation?
Propagate plans from untreated seeds and sow seeds in the fall. Since this species is a biennial, so be sure to plant the seeds two successive years to establish a continuously flowering population. This primrose will vigorously reseed until proper conditions.

Sunset Zones
Sunset Zones?
5, 6, 7, 14*, 15*, 16*, 17*, 18*, 19*, 20*, 21*, 22*, 23*, 24*

Natural Setting
Site Type
Site Type
Moist places, disturbed areas, coastal areas.

Climate
Climate
Annual Precipitation: 10.4" - 51.7", Summer Precipitation: 0.17" - 2.70", Coldest Month: 28.0" - 54.9", Hottest Month: 56.1" - 83.0", Humidity: 0.48" - 33.70", Elevation: -3" - 7385"

Alternative Names
Botanical Names: Oenothera hookeri
Common Names: Common Evening Primrose, Hooker's Eveningprimrose, Showy Evening Primrose


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora


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