Scientific Name: Calylophus berlandieri

Common Names: Berlandier's Sundrop, Sundrop, Square-bud Primrose, Texas Primrose

Native to: Texas, Mexico, and parts of the southwestern United States

Lighting Requirements: Full Sun to part shade

Height: 12-18 inches 

Width: 12-18 inches 

Winter Look: Semi-evergreen in some locations

Seasonal Interest: Spring to summer (yellow, cup-shaped flowers)

Drought Tolerance: High; very drought-tolerant once established

Soil Requirements: Well-drained, sandy or loamy soils

pH Range: 6.0 - 7.5 (slightly acidic to neutral)

Hardiness Zones: USDA Zones 7-10

Deer Resistance: Moderate; occasionally browsed by deer

Attracts: Bees, Butterflies

Notes: Known for its bright yellow flowers that bloom profusely in the spring and summer. A great addition to xeriscapes, rock gardens, and wildflower gardens. Tolerates drought and poor soils well, making it a low-maintenance choice for tough landscapes. It’s an excellent choice for attracting pollinators. 

Calylophus is on most deer-resistant lists, but I remember from years back that the deer were bothering these. We may have been in a drought at the time. Just in case, spray them with a deer repellant for the first two weeks.