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.
Legend of Symbols
Full Sun |
Part Shade |
Fragrant |
Very Low Water  |
Low Water  |
Medium Water  |
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