Oenothera Species, Evening Primrose, Chilean Evening Primrose, Sweet Sundrop

Oenothera stricta

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


Alpines and Rock Gardens



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Flowers are fragrant

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


36-48 in. (90-120 cm)


12-15 in. (30-38 cm)

15-18 in. (38-45 cm)


USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:

Full Sun


Unknown - Tell us

Bloom Color:

Bright Yellow

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Blooms repeatedly





Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

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


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

Riverside, California

San Francisco, California

Derby, Kansas

Gardeners' Notes:


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.


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.


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.


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


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.