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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.
how to grow Blue bugloss
more varieties for Blue bugloss
Anchusa officinalis, sometimes also called common bugloss, is considered a noxious weed in some regions of the West. It prefers dry, sandy soil. Remove faded flower stalks to prevent the plant from spreading by seed. Zones 4-8
Anchusa azurea is a coarse-textured plant with forget-me-not-like blue flowers in late spring to early summer. The 3-foot-tall plants require excellent drainage to prevent them from rotting over winter. Promptly deadhead flower stalks after bloom to prevent self-seeding. Zones 3-8
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This hard-working group of perennials does so much. They bloom for a long time in wonderful colors atop tall, striking plants. They produce a nectar that is irresistible to hummingbirds and butterflies. Most are heat and drought tolerant. And their foliage and flowers are fragrant, with scents ranging from licorice to bubblegum.Most require well-drained soil and prefer full sun, although they will tolerate light shade.
Add a pool of sunshine to the garden with a massed planting of black-eyed Susan. From midsummer, these tough native plants bloom their golden heads off in sun or light shade and mix well with other perennials, annuals, and shrubs. Tall varieties look especially appropriate among shrubs, which in turn provide support. Add black-eyed Susans to wildflower meadows or native plant gardens for a naturalized look. Average soil is sufficient for black-eyed Susans, but it should be able to hold moisture fairly well.