Oenothera fruticosa ssp. glauca
Oenothera fruticosa L. ssp. glauca (Michx.) Straley
Narrowleaf evening-primrose, Sundrops
Onagraceae (Evening-Primrose Family)
Synonym(s): Kneiffia glauca, Kneiffia hybrida, Kneiffia latifolia, Kneiffia tetragona, Oenothera riparia, Oenothera tetragona, Oenothera tetragona ssp. glauca, Oenothera tetragona var. fraseri, Oenothera tetragona var. hybrida, Oenothera tetragona var. latifolia
USDA Symbol: OEFRG
A longstanding garden favorite, this Oenothera lends vivid yellow color during late spring and early summer. Its dark green foliage provides a soothing backdrop to the flowers. It colonizes via stolons and runners but isnt terribly aggressive, remaining at a well-behaved 2 feet by 2 feet when planted. In the wild, it occurs naturally in woodland openings east of the Mississippi River in acidic, typically rocky, but rich soils.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Size Notes: Normally 1 to 2 feet tall, but can exceed 5 feet
Leaf: Dark green with reddish tinge in winter
Flower: Flowers 2 inches wide.
Fruit: 1/2 inch
Size Class: 1-3 ft. , 3-6 ft.
Bloom InformationBloom Color: Yellow
Bloom Time: Apr , May , Jun
Bloom Notes: Flowers close at night.
DistributionUSA: AL , CT , DC , DE , GA , IL , IN , KY , LA , MA , MD , ME , MI , MO , NC , NH , NJ , NY , OH , PA , RI , SC , TN , VA , WV
Native Distribution: east of the Mississippi River, Zones 5 through 8
Native Habitat: Sunny, rocky spots and open woodlands
Growing ConditionsWater Use: Low , Medium
Light Requirement: Sun , Part Shade
Soil Moisture: Dry , Moist
Soil pH: Acidic (pH<6.8)
CaCO3 Tolerance: Low
Drought Tolerance: Medium
Soil Description: Tolerates a wide range but likes high acidity, rich soils. Also grows in clay, sandy, and rocky soil.
Conditions Comments: Prefers good drainage and does not tolerate lime or brackish soils.
BenefitUse Ornamental: An old-fashioned garden favorite finding renewed favor as native plants become popular.
Conspicuous Flowers: yes
Nectar Source: yes
Value to Beneficial InsectsSpecial Value to Native Bees
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
PropagationPropagation Material: Root Division , Seeds
Commercially Avail: yes
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Delaware Nature Society - Hockessin, DE
BibliographyBibref 1620 - Gardening with Native Plants of the South (Reprint Edition) (2009) Wasowski, S. with A. Wasowski
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Additional resourcesUSDA: Find Oenothera fruticosa ssp. glauca in USDA Plants
FNA: Find Oenothera fruticosa ssp. glauca in the Flora of North America (if available)
Google: Search Google for Oenothera fruticosa ssp. glauca
MetadataRecord Modified: 2017-07-28
Research By: TWC Staff