Alphabetical Plant Listing

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 (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 midsummer, 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.
  • 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.

Not sure which Oenothera - Primroses - Sundrops to pick?
Compare All Oenothera - Primroses - Sundrops

Buy Calylophus serrulatus (Plains Evening Primrose)

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 Oenothera - Primroses - Sundrops
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 – 45cm)
Water Needs Low
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Showy
Native Plants United States, Midwest, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, South Dakota, Wisconsin, Rocky Mountains, Colorado, Montana, Wyoming, Southeast, Arkansas, Kentucky, Southwest, Arizona, New Mexico, Oklahoma, Texas
Tolerance Drought, Dry Soil, Rocky Soil
Garden Uses Beds and Borders
Garden Styles Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow

Buy Plants

Great Plant Combination Ideas with Oenothera - Primroses - Sundrops


Matt Lavin, Flickr

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.


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 Oenothera - Primroses - Sundrops
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 – 45cm)
Water Needs Low
Maintenance Low
Soil Type Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Showy
Native Plants United States, Midwest, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, South Dakota, Wisconsin, Rocky Mountains, Colorado, Montana, Wyoming, Southeast, Arkansas, Kentucky, Southwest, Arizona, New Mexico, Oklahoma, Texas
Tolerance Drought, Dry Soil, Rocky Soil
Garden Uses Beds and Borders
Garden Styles Gravel and Rock Garden, Informal and Cottage, Prairie and Meadow

Great Plant Combination Ideas with Oenothera - Primroses - Sundrops

Plant Calculator

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

%
ft
ft

Your Shopping List

Plant Quantity
Calylophus serrulatus (Plains Evening Primrose)

Find your Hardiness Zone

Find your Climate Zone

Find your Heat Zone

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!

Create a New Collection

Optional. For your reference.


Move Selected Plants to a Different Collection


Delete Collection

This field is required.