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Bransford, W.D. and Dolphia
Calylophus hartwegii (Benth.) Raven
Hartweg's sundrops, Western Primrose
USDA Symbol: caha14
USDA Native Status: Native to U.S.
Bloom InformationBloom Color: Yellow
Bloom Time: Mar , Apr , May , Jun , Jul , Aug , Sep , Oct , Nov
AZ , CO , KS , NM , OK , TX Native Habitat:
Prairie, Plains, Meadows, Pastures, Savannahs USDA Native Status: L48(N)
Growing ConditionsWater Use: Low
Light Requirement: Part Shade
Soil Moisture: Dry
Soil Description: Clay, Clay Loam, Medium Loam, Sandy Loam, Sandy, Limestone-based, Gypseous, Caliche type
Conditions Comments: Somewhat upright and bushy plant with narrow leaves and soft yellow cup flowers that open in the evening and close the next afternoon shortly before new flowers open. This plant prefers fast draining soil and loves reflected heat making it an excellent choice for a rock garden or rocky slope. Deadheading and giving it some summer water will prolong the flowers. Cut back to 6-8 in the autumn to reshape.
BenefitUse Ornamental: Perennial
garden, Color, Blooms ornamental, Rock gardens, Showy, Attractive Conspicuous Flowers:
PropagationPropagation Material: Seeds
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Record Modified: 2007-01-01
Research By: DEW, JSC