Find plants
My list (0)
Sierra Sundrop, Sundrops, Hartweg's Sundrops
Calylophus hartwegii
Somewhat upright, perennial groundcover with narrow, green to gray-green foliage. Bright to lemon yellow, 1 inch, cup-shaped flowers. Color fades to orange as flowers age. Flowers open in the evening and close the following afternoon. An individual bloom lasts for a single day. Remove spent flowers and provide some extra water in summer to encourage continued blooming. Likes reflected heat, but can take some shade in our area. Does best in well-drained soils. Cut back to the ground in late winter or early spring.
- Plant type: Shrub
- Maintenance level: Medium, Low
- Water requirement: Low
- Sun exposure: Full, Part Sun, Morning Sun, Afternoon Sun, Reflected Heat
- Height range: 8–16 Inches
- Width range: 1–3 Feet
- Canopy value: 3 ft²
- Growth rate: Fast
- Seasonal habit: Deciduous, Semi-Deciduous
- Flower color: Yellow, Orange
- Flower season: Spring, Summer, Autumn
- General foliage color: Grey, Green
- Design style: Pool Friendly, Patio Plant
- Hardiness cold tolerance: -20 °F
- Soil preference: Sand, Clay, Loam, Rocky, Well Drained, Dry
- Native location: Arizona, southern Colorado, western Nebraska, New Mexico, Texas, and Mexico
- PH preference: Not Particular
- Sunset zones: 1, 2, 3, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24
- USDA hardiness zone: 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
New Search