Sundrops, Fendler’s Sundrops
Calylophus hartwegii fendleri

  • Plant Form: Perennial subshrub
  • Water Use: Low
  • Mature Size: 1 ft. tall x 2 ft. wide
  • Exposure: Full sun, part shade
  • Bloom Time: Spring (Mar-May), Summer (June-Aug), Fall (Sept-Oct)
  • Native to: Arizona, Colorado, Kansas, New Mexico, Oklahoma, Texas, Mexico
  • Hardiness: Cold hardy to 0°F

This long-blooming, cheery perennial brightens up any space where it is planted. Besides its masses of yellow flowers, you will appreciate Sundrops’ drought tolerance, heat tolerance, and its low water use. Your night-flying pollinators will love it as well. A fabulous addition to rock gardens!

Sundrops cheer up drab spots in your garden, and quickly spread by underground rhizomes into rounded, flower-filled mounds. Masses of yellow 1-2 inch flowers appear over a long season above narrow, bright green leaves. Flowers open in the afternoon and remain open until the next morning, providing nectar to night-flying moths. Each flower lasts 24 hours, and then fades to orange-pink, creating a nice sunset color palette. Cut back the stems of this evening primrose look-alike when it goes dormant in winter to reshape and prepare for new spring growth. This tough plant takes heat and drought, and is attractive between boulders, massed in clusters, or in containers. Plant in well-drained soil, and even though they don’t like to be overwatered, they appreciate a little extra water in summer. Lovely in rock gardens, meadow gardens, borders, beds, on slopes, as a ground cover, or anywhere they can drape over edges.

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