Top 8 Blue Perennial Flowers for Your Garden

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Blue perennial flowers add a calm coolness to your garden in the sweltering heat of the summer sun. In varying shapes, sizes and hues, blue perennials are a wonderful enhancement to an all-blue or a mixed garden. There are many blue perennials that would be a beautiful addition to your garden or as potted plants, but here are 8 great blue perennials to add to your garden.

Blue Star

These are beautiful wild flowers that grow in wooded areas and along river banks from Texas to New Jersey. They are tolerant to dry soil and love full sun to partial shade. Growing between 24 and 36 inches tall, Blue Stars are perfect for a wildflower garden. They bloom between May and June, and in the fall, the leaves turn a pretty butterscotch color.


Irises are also a good blue perennial to add to your garden, especially the Siberian Iris. Hardy in zones 4a to 9b, the Siberian Iris requires average watering. If you live in a wooded area, keep in mind that the Siberian iris is deer-resistant, growing to 24 to 36 inches tall. They love full sun and bloom late spring to midsummer.

Wild Blue Indigo

Baptisia, or Wild Blue Indigo, is a drought-tolerant beauty that loves sunshine. With deep blue blooms, this blue perennial will grow just about anywhere in zones 3a to 10b. The wild Blue Indigo may take up to two years to establish, but is well worth it. Blooming in late spring to early summer, Wild Blue Indigo will grow between 18 - 24 inches tall, perfect for the front or middle of your perennial garden.


These are a lovely late-winter bloomer that may, in fact, be the first awakening to spring. They will bloom into early summer and need consistently moist soil. Forget- me-nots are especially vigorous after a harsh winter. In addition to their gorgeous blue blooms, Forget-me-nots also sport heart-shaped leaves and grow 12 to 18 inches tall. They prefer partial to full shade and are hardiest in zones 3a to 7b.

Mountain Bluet

For a low maintenance addition to your garden, try the Mountain Bluet. Growing 24 to 36 inches tall with electric blue blooms and fuzzy, velvet-like chartreuse leaves, the Mountain Bluet is a wonderfully easy perennial to grow. Hardy in zones 3a to 8b, the Mountain Bluet is an eye-catching blue perennial that is rugged and spreads quickly. It will bloom from late spring to early fall and require regular watering.

Blue Verbena

Blue Verbena are a very fragrant and drought-tolerant blue perennial. They are a butterfly magnet and bloom from spring to fall. Perfect for the front of your blue perennial garden, Blue Verbena loves the sun and grows between 6 to 12 inches tall. Hardy in zones 7b to 10b, Blue Verbena are also good for drying.


This is a very fragrant blue perennial that grows vigorously. The Bluebell's bell-shaped blue blooms attract butterflies and prefer an organic, well-drained soil. These lovely Bluebells grow between 6 and 18 inches tall and prefer full-sun to partial shade.

Hawaiian Blue Eyes

Also called  Blue Daze, these blue perennials are also a hardy ground cover plant. Preferring a more tropical climate, Hawaiian Blue Eyes are hardy in zones 8 to 11. They bloom mid-summer to mid-fall and are sometimes classified as a tender perennial. They have gorgeous blue-green blooms and fuzzy, velvet leaves, and they need regular watering. They grow 6 to 12 inches tall and make a wonderful addition to any garden.

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