Penstemon ambiguus
Plants of the Southwest

Penstemon ambiguus

Phlox or Sand Penstemon

Phlox or Sand Penstemon is a perfectly symmetrical 2 ft. bush, laden with flowers in spring. Phlox-like flowers are white to pink. Needs sandy, well-drained soil. Unlike most Penstemons, ambiguus does not need cold stratification. Extremely drought tolerant perennial. Sow anytime. Germination is erratic and may be delayed by midsummer heat. Zones 5-9.

    Zones, Sun & Water Needs: 56789


Legend of Symbols

Full Sun
Full Sun
Part Shade
Part Shade
Fragrant
Very Low Water 
Very Low Water
Low Water 
Low Water
Medium Water 
Medium Water