Penstemon
Overview
Penstemon are hardy perennials. The nickname of beardtongue refers to the pollen-free stamen that protrudes from the flower, resembling a bearded iris in this aspect. Plant in spring to early summer.
Water
Penstemons tolerate drought, but 1 inch of water per week in the summer will keep plants vigorous and promote better blooming.
Light
Plant in an area that receives full sun. Adequate sun exposure helps the tall stalks stay upright and not droop.
Soil
Use soil that drains very well. These plants are prairie natives and prefer rocky or sandy lean soil types rather than rich garden loam. Avoid manure.
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