Create Your Garden

Calylophus serrulatus (Plains Evening Primrose)

Yellow Sundrops, Yellow Evening Primrose, Plains Evening Primrose, Toothed Evening Primrose, Calylophus australis, Meriolix intermedia, Meriolix oblanceolata, Meriolix serrulata, Oenothera serrulata, Oenothera serrulata var. typica

Calylophus serrulatus, Yellow Sundrops, Yellow Evening Primrose, Plains Evening Primrose, Oenothera serrulata, Yellow Flowers, Perennial Flowers
Calylophus serrulatus, Yellow Sundrops, Yellow Evening Primrose, Plains Evening Primrose, Oenothera serrulata, Yellow Flowers, Perennial Flowers
Calylophus serrulatus, Yellow Sundrops, Yellow Evening Primrose, Plains Evening Primrose, Oenothera serrulata, Yellow Flowers, Perennial Flowers

Calylophus serrulatus (Plains Evening Primrose) is a low, shrubby, woody-based perennial boasting small, yellow, four-petaled, stalkless flowers borne from the upper leaf axils. Blooming from mid-spring to mid-summer, the blossoms are more profuse at the beginning of the flowering period, becoming sporadic throughout the rest of the summer. Unlike many other evening primrose species, the flowers open in the evening and remain open for the entire day. They are followed by 1 in. long seed capsules (2.5 cm). The 2 in. leaves (5 cm) are narrow, lance-shaped, and sharply toothed. Native to western North America, Calylophus serrulatus can be found growing in dry prairies and mesas. A valuable plant for dry border fronts, rock gardens, and prairies.

  • Grows up to 6-18 in. tall and wide (15-45 cm).
  • Best in full sun in gravelly or sandy, dry, well-drained soils. Excellent drought tolerance.
  • A great choice for prairies and meadows, wildflower gardens, rock gardens, and border fronts.
  • No serious pest or disease issues.
  • Propagate by seed or cuttings taken in early summer. This is a taprooted plant that can be difficult to transplant once established.
  • Native to western North America.

 

Requirements

Hardiness 3 - 8
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Onagraceae
Genus Oenothera
Exposure Full Sun
Season of Interest Spring (Mid, Late)
Summer (Early, Mid)
Height 6" - 2'
(15cm - 60cm)
Spread 6" - 2'
(15cm - 60cm)
Spacing 6" - 18"
(15cm - 50cm)
Maintenance Low
Water Needs Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Showy
Native Plants United States, Rocky Mountains, Southwest, Southeast, Midwest, South Dakota, Illinois, Wisconsin, North Dakota, Iowa, Nebraska, Missouri, Minnesota, Michigan, Indiana, Kansas, Arkansas, Kentucky, Oklahoma, Arizona, New Mexico, Texas, Montana, Wyoming, Colorado
Tolerance Drought, Dry Soil, Rocky Soil
Garden Uses Beds And Borders
Garden Styles Informal and Cottage, Gravel and Rock Garden, Prairie and Meadow
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Oenothera (Evening Primrose)
Not sure which Oenothera (Evening Primrose) to pick?
Compare Now

Alternative Plants to Consider

Camissoniopsis cheiranthifolia (Beach Primrose)
Calylophus lavandulifolius (Lavendar-leaf Sundrops)
Oenothera elata (Hooker’s Evening Primrose)
Oenothera pallida (Pale Evening Primrose)
Oenothera fruticosa (Sundrops)
Oenothera speciosa ‘Siskiyou’ (Evening Primrose)

Recommended Companion Plants

Artemisia filifolia (Sand Sagebrush)
Monarda punctata (Spotted Bee Balm)
Oenothera pallida (Pale Evening Primrose)
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
Buy Plants

Requirements

Hardiness 3 - 8
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Onagraceae
Genus Oenothera
Exposure Full Sun
Season of Interest Spring (Mid, Late)
Summer (Early, Mid)
Height 6" - 2'
(15cm - 60cm)
Spread 6" - 2'
(15cm - 60cm)
Spacing 6" - 18"
(15cm - 50cm)
Maintenance Low
Water Needs Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Showy
Native Plants United States, Rocky Mountains, Southwest, Southeast, Midwest, South Dakota, Illinois, Wisconsin, North Dakota, Iowa, Nebraska, Missouri, Minnesota, Michigan, Indiana, Kansas, Arkansas, Kentucky, Oklahoma, Arizona, New Mexico, Texas, Montana, Wyoming, Colorado
Tolerance Drought, Dry Soil, Rocky Soil
Garden Uses Beds And Borders
Garden Styles Informal and Cottage, Gravel and Rock Garden, Prairie and Meadow
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Oenothera (Evening Primrose)
Not sure which Oenothera (Evening Primrose) to pick?
Compare Now

Gardening Ideas

Plant Calculator

How many Calylophus serrulatus (Plains Evening Primrose) do I need for my garden?

Input your garden space dimensions

Your Shopping List

Plant Quantity
Calylophus serrulatus (Plains Evening Primrose) N/A Buy Plants

Please Login to Proceed

You Have Reached The Free Limit, Please Subscribe to Proceed

Subscribe to Gardenia

To create additional collections, you must be a paid member of Gardenia
  • Add as many plants as you wish
  • Create and save up to 25 garden collections
Become a Member

Plant Added Successfully

You have Reached Your Limit

To add more plants, you must be a paid member of our site Become a Member

Update Your Credit
Card Information

Cancel

Create a New Collection

Sign Up to Our Newsletter

    You have been subscribed successfully

    Join Gardenia.net

    Create a membership account to save your garden designs and to view them on any device.

    Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

    Join now and start creating your dream garden!

    Join Gardenia.net

    Create a membership account to save your garden designs and to view them on any device.

    Becoming a contributing member of Gardenia is easy and can be done in just a few minutes. If you provide us with your name, email address and the payment of a modest $25 annual membership fee, you will become a full member, enabling you to design and save up to 25 of your garden design ideas.

    Join now and start creating your dream garden!

    Find your Hardiness Zone

    Find your Heat Zone

    Find your Climate Zone