Calylophus Species, Lavender-leaf Sundrops, Hartweg's Sundrops, Western Primrose
Calylophushartwegii

Family: Onagraceae (on-uh-GRAY-see-ee)
Genus: Calylophus (kal-ee-LOW-fus)
Species: hartwegii (hart-WEG-ee-eye)

Synonym:Oenothera hartwegii

Synonym:Salpingia hartwegii

Category
Perennials

Water Requirements
Drought-tolerant; suitable for xeriscaping

Sun Exposure
Full Sun

Foliage

Foliage Color
Bronze

Height
12-18 in. (30-45 cm)

Spacing
15-18 in. (38-45 cm)

Hardiness
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)

Where to Grow

Danger
N/A

Bloom Color
Bright Yellow

Bloom Characteristics

Bloom Size

Bloom Time
Mid Summer
Late Summer/Early Fall
Blooms repeatedly

Other details

Soil pH requirements

Patent Information
Non-patented

Propagation Methods
By dividing the rootball

Seed Collecting