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Pruning Penstemon

I love penstemons. They are long flowering. They flower from mid summer until the first frosts. They have tubular flowers, a bit like foxgloves but smaller. They make great border plants. Plant in a sunny position. Penstemons are sub-shrubs which means they form a woody base and have soft top growth. They will be affected by frost but only the leafy part. Trim in the spring to remove any frost affected growth and to keep them nice and bushy. They combine well in many different planting schemes from cottage garden to modern New Wave with grasses. I am experimenting with growing them in a pot. Dead head penstemons to keep them flowering.