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It's tough to find a perennial with truer blue flowers than bugloss. A beautiful plant with a less-than-beautiful name, bugloss can be short-lived but readily reseeds as long as you refrain from deadheading for a while after it blooms. However, deadheading will prolong blooms, so you'll have a choice to make.
By late summer, the coarse, hairy leaves often look tired and tattered, so cut them back hard after bloom to reinvigorate plants.