17 Blue Perennials

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    If you are looking to fill your garden with blue plants, here is a list of 17 perennials to help get you started.

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    Agapanthus 'Little Galaxy'

    (Lily of the Nile) Agapanthus are typically grown in warmer zones, but these vigorous varieties are hardy to zone 6! These plants have overwintered in our heavy snow winters for the past 7 years. They're out of this world with globular clusters that are produced on tall stems over large, rounded clumps of foliage.

    Full Sun | Zones: 6-10 | Blooms Midsummer to Early Fall

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  • 3.

    Amsonia t. 'Storm Cloud'

    (Blue Star) New stems emerge near-black like a dark rain cloud. Dark green leaves have silver veining and form a wide, mounded habit. Light periwinkle blue, star-shaped flowers cover the plant for many weeks.

    Full to Part Sun | Zones: 4-9 | Blooms Late Spring to Early Summer

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  • 4.

    Baptisia DECADENCE® 'Sparkling Sapphires'

    (False Indigo) Violet-blue blossoms with a pale yellow keel are produced on 8” long spikes over grey-green leaves. Compact habit makes it easy to fit into any garden. Decorative seed pods in fall.

    Full to Part Sun | Zones: 4-9 | Blooms Late Spring to Early Summer

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  • 5.

    Campanula g. 'Church Bells'

    (Clustered Bellflower) A no fuss perennial with refined performance and flower quality. Well-formed clusters of violet purple flowers.

    Full to Part Sun | Zones: 5-8 | Blooms Late Spring to Midsummer

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    Clematis 'Stand By Me'

    Blue bell-shaped flowers appear late May to June, with some rebloom in later summer months. Attractive cream thread-like seed heads. Broad, green foliage; new leaves have a bronze cast to the undersides. This plant benefits from staking, cages, or neighboring plants for support. Excellent perennial for attracting pollinators.

    Full to Part Sun | Zones: 3-7 | Blooms Late Spring to Midsummer

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    Delphinium e. 'Million Dollar Sky'

    (Hybrid Bee Delphinium) Large spikes of semi-double to double light blue flowers with a white bee. Strong, erect stems carry the prominent blossoms above the dark green, deeply dissected foliage. Very heat tolerant.

    Full to Part Sun | Zones: 3-7 | Blooms in Early Summer

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  • 8.

    Festuca g 'Blue Whiskers'

    (Blue Fescue) Taller and more vigorous than ‘Elijah Blue', with longer leaves and a brighter, silver-blue foliage color. Forms a fully rounded, robust clump with consistent flower coverage. Yellow-green flowers age to tan as the season progresses.

    Full to Part Sun | Zones: 4-8 | Blooms Early to Midsummer

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  • 9.

    Hosta SHADOWLAND® 'Diamond Lake'

    (Hosta) Heart-shaped blue leaves are thick and heavily corrugated with wavy margins. The large size of this plant translates to large leaves: measuring up to 9” wide by 11” long. Pale lavender flowers appear in early to midsummer.

    Part Sun to Full Shade | Zones: 3-9 | Blooms in Early Summer

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    Iris s. 'Cape Cod Boys'

    (Sibirian Iris) Periwinkle blue flowers with dark blue veining that intensifies into a defined pattern at the end of the petals. Prominent clear lemon yellow signals. This variety blooms for a long time.

    Full to Part Sun | Zones: 3-9 | Blooms in Early Summer

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  • 11.

    Lavandula a. Sweet Romance®

    (English Lavender) This early blooming lavender flowers well without vernalization. Plump, rich violet purple, branched flower spikes top the compact mound of grey-green foliage beginning early summer. A staple item for every sunny garden.

    Full Sun | Zones: 5-9 | Blooms Early Summer to Early Fall

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  • 12.

    Nepeta 'Cat's Pajamas'

    (Catmint) A small scale version of ‘Cat's Meow' at half the size and blooming 2-3 weeks earlier. Ball-shaped habit carries long, dark flower stems with indigo blue flowers that bloom from the soil to the tips of the stems. Rosy purple calyxes give your garden an additional splash of color.

    Full Sun | Zones: 3-8 | Blooms Early Summer to Early Fall

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  • 13.

    Perovskia atriplicifolia 'Denim 'n Lace'

    (Russian Sage) One of the best Perovskia we offer–a must have! Stays compact, has stronger stems, with a more upright habit than most older varieties. Lace-like, bright sky blue flowers are held on amethyst calyxes for a very full look.

    Full Sun | Zones: 4-9 | Blooms Late Summer to Mid Fall

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  • 14.

    Polemonium 'Heaven Scent'

    This easy-to-grow perennial looks great in the middle to front of the flower border. It easily mixes with most other garden plants. Though most Polemoniums prefer afternoon shade, 'Heaven Scent' seems to be able to take a bit more sun than the others as long as a good supply of moisture is available.

    Full Sun to Part Shade | Zones: 3-7 | Blooms in Late Spring

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  • 15.

    Pulmonaria 'Twinkle Toes'

    (Lungwort, Bethlehem Sage) Dainty light periwinkle blue flowers cover a low, mounded habit. Dark green leaves are lightly sprinkled with silver. Thrives in part shade to full shade with adequate moisture.

    Part to Full Shade | Zones: 3-9 | Blooms in Late Spring

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  • 16.

    Salvia n. COLOR SPIRES® 'Crystal Blue'

    (Perennial Salvia) A revolutionary color for hardy salvia! Light sky blue flowers are presented on strong, thick stems. Blooms without vernalization but is beneficial for bulking the dense, rugose grey-green foliage. Long season of bloom.

    Full Sun | Zones: 3-8 | Blooms Late Spring to Early Summer

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  • 17.

    Veronica 'Blue Skywalker'

    (Spike Speedwell) This taller perennial provides height in the garden without too much horizontal space. Lavender-blue flower spikes cover the top half of an incredibly upright, dense habit of dark green leaves.

    Full to Part Sun | Zones: 4-8 | Blooms Mid to Late Summer

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  • 18.

    Veronica MAGIC SHOW® 'Wizard of Ahhs'

    (Spike Speedwell) One of the earliest Veronica to bloom, this plant produces thick spikes of violet-blue flowers that cover the top half of a low, wide habit. This perennial requires vernalization to bloom and is an improvement over ‘Hocus Pocus'.

    Full to Part Sun | Zones: 4-8 | Blooms Early to Midsummer

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Varieties Mentioned in this Article