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Drummond's Sundrops

Calylophus drummondii

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Drummond's Sundrops (Calylophus drummondii) at Roger's Gardens

Drummond's Sundrops flowers

Drummond's Sundrops flowers

(Photo courtesy of NetPS Plant Finder)

Drummond's Sundrops (Calylophus drummondii) at Roger's Gardens

Drummond's Sundrops

Drummond's Sundrops

(Photo courtesy of NetPS Plant Finder)

Height:  8 inches

Spread:  30 inches

Sunlight:  full sun  partial shade 

Hardiness Zone:  8b

Other Names:  Square-bud Primrose, Texas Primrose


An evergreen perennial that blooms profusely in spring and early summer with masses of bright yellow cup shaped blooms; drought tolerant once established; an excellent choice for rock gardens

Ornamental Features

Drummond's Sundrops has masses of beautiful lightly-scented yellow cup-shaped flowers at the ends of the stems from early spring to early summer, which are most effective when planted in groupings. Its small narrow leaves remain green in color throughout the year.

Landscape Attributes

Drummond's Sundrops is an herbaceous evergreen perennial with a ground-hugging habit of growth. It brings an extremely fine and delicate texture to the garden composition and should be used to full effect.

This is a relatively low maintenance plant, and is best cleaned up in early spring before it resumes active growth for the season. It is a good choice for attracting bees, butterflies and hummingbirds to your yard. It has no significant negative characteristics.

Drummond's Sundrops is recommended for the following landscape applications;

  • Mass Planting
  • Rock/Alpine Gardens
  • General Garden Use
  • Container Planting

Planting & Growing

Drummond's Sundrops will grow to be about 8 inches tall at maturity, with a spread of 30 inches. Its foliage tends to remain low and dense right to the ground. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 5 years. As an evegreen perennial, this plant will typically keep its form and foliage year-round.

This plant does best in full sun to partial shade. It prefers dry to average moisture levels with very well-drained soil, and will often die in standing water. It is considered to be drought-tolerant, and thus makes an ideal choice for a low-water garden or xeriscape application. It is particular about its soil conditions, with a strong preference for clay, alkaline soils, and is able to handle environmental salt. It is somewhat tolerant of urban pollution. This species is native to parts of North America.

Drummond's Sundrops is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. Because of its spreading habit of growth, it is ideally suited for use as a 'spiller' in the 'spiller-thriller-filler' container combination; plant it near the edges where it can spill gracefully over the pot. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

Hardiness Zone Plant Height Minimum Sunlight Soil pH Preference
Massing  Rock  Garden  Container 
Flowers  Texture  Attracts Wildlife 
Ornamental Features