California Gardens - The Year Round Gardening Site

Penstemon Holly's White

Penstemon Holly's White puts on a great show of flowers through the Spring, Summer and Fall. These perennial Penstemons are at their best for two to three years. In order to continue to thrive new parts of Penstemon Holly's White must layer into the garden soil. Penstemon Holly's White is great for quickly filling in a young garden or a newly opened space. I regularly trim off the dead flower stalks to keep the plants blooming. I cut Penstemon Holly's White back heavily in the late winter. The Penstemon gloxinoides group will take temperatures down to 10° F. The upper parts of the plants will be damaged in the upper to mid teens. I have sometimes had trouble with mites and have cut off the affected portions to fairly good success even when this means nearly cutting the plant to the ground.

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Penstemon Holly's White