Photo by Melody

PlantFiles: Evening Primrose
Oenothera stricta

Family: Onagraceae (on-uh-GRAY-see-ee) (Info)
Genus: Oenothera (ee-no-THEE-ruh) (Info)
Species: stricta (STRIK-tuh) (Info)

One member has or wants this plant for trade.


18-24 in. (45-60 cm)

18-24 in. (45-60 cm)

USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun

Unknown - Tell us

Bloom Color:
Bright Yellow

Bloom Time:
Late Spring/Early Summer


Other details:
Flowers are fragrant

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
By dividing the rootball
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:
Collect seedhead/pod when flowers fade; allow to dry
Allow pods to dry on plant; break open to collect seeds
Allow unblemished fruit to ripen; clean and dry seeds
Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds

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There are a total of 13 photos.
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2 positives
3 neutrals
No negatives

Gardeners' Notes:

Positive cinemike On Sep 9, 2010, cinemike from CREZIERES
France (Zone 8a) wrote:

This came in a packet of mixed seeds from Chilterns. I left it growing in a nursery bed for four months while I went back to Ireland. It survived a very dry spring and early summer so I think it could be good for dry situations.
Nice enough plant - the 'straggly' clumps of foliage give it a slightly'other-worldly' appearance.

Neutral htop On Apr 24, 2008, htop from San Antonio, TX (Zone 8b) wrote:

I have not grown this plant. Chilean evening primrose, South American evening primrose, fragrant evening primrose, sweet sundrop (Oenothera stricta; synonym: Oenothera stricta ssp. stricta, Oenothera odorata) is native to Chile and Argentina. It has widely naturalized in many locales around the globe including California and Hawaii. Oenothera stricta differs from other Oenothera spp. in that it is only sparsely hairy (only the stem leaves have hairs), the basal leaves are over 80 mm long with the stem leaves not pinnatifid, the flowers are smaller, the floral tube is less than 60 mm long and the seed capsule is cylindrical. The fragrant flowers begin as yellow, turn to peach and then to coral-red. The petals often have a red spot at the base.

Neutral smiln32 On Aug 29, 2004, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

Red buds burst open into large, fragrant yellow flowers. This hardy plant is a biennial.

Neutral wanda0810 On Sep 11, 2003, wanda0810 from Ashville, OH (Zone 5b) wrote:

I have this plant in zone 5 and I have seen humming bird moths on it twice in the past two years.This is a weed in Ohio but I love it.Wanda/Ashville Ohio

Positive nu_bu On Aug 25, 2003, nu_bu wrote:

I am in living in Ireland and got seeds from my aunt living in Essex, England and it has grown very well. As the name implies it is supposed to only bloom in the evenings, but mine also blooms in the mornings - thats Irish for you!!

I have found it very easy to take cuttings from this plant and pass it on to friends of mine also.


This plant has been said to grow in the following regions:

Riverside, California
San Francisco, California
Derby, Kansas

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