Blue Flowers or Flower Parts

Spikes of intense deep violet-blue flowers are produced from late spring or early summer and into fall on this repeat flowering hybrid native perennial.  STARSHIP™ Blue Lobelia was selected not only for its dark flowers but is also touted for its ability to repeat flower throughout the growing season. The nectar rich flowers attract hummingbirds, bees, and butterflies. These Lobelias prefer consistently moist, moderately fertile, well-drained soils and sunny conditions. STARSHIP™ Blue Lobelia can be enjoyed as a container plant as well as in the garden or landscape. Images courtesy of Walter's Gardens, Inc., all rights reserved. Item# 12258

Rounded clusters of star-shaped sky blue flowers adorn the ends of sturdy stems in spring. Starstruck Bluestar or Amsonia develops into a neat rounded mound of deep green foliage to about 20" high once flowering is complete. This is an easy and reliable clump forming perennial that is tolerant of wet, moist, to average moist sites and that will only get better with age. Bluestars are pest, disease, and deer resistant perennials that are considered to be somewhat drought resistant once well-established. Images courtesy of Walter's Gardens, Inc., all rights reserved. Item# 12110

Huge round clusters composed of extra large bell-shaped deep violet-blue flowers held on sturdy stems atop the narrow strap-like medium green foliage in late spring to early summer and potentially into fall on well-established clumps. Stevie's Wonder Lily of the Nile or Agapanthus is a vigorous, clump-forming perennial with a tropical look but this cultivar has proven to have excellent hardiness into zone 7. The flowering spikes are typically 2-3' high in areas that experience hardy winter freezes (zone 7-8) but they are reported to reach up to 6' high in zone 9 with reports that the flower clusters can reach near volleyball size! The flowers of Agapanthus attract bees, butterflies, and hummingbirds. Provide Stevie's Wonder Lily of the Nile a full to partly sunny site in a well-drained, average moist, fertile soil for optimum vigor and flowering. Makes an easy and low-maintenance container plant where not hardy. May be fully winter deciduous. Image credited to Emerisa Gardens via AG3, Inc., all rights reserved. Item# 12467

6" wide rounded clusters of 1" wide deep blue-purple to dark purple trumpet shaped flowers are produced atop sturdy 3' high stalks in summer that attract bees, butterflies, and hummingbirds. Though recent competition has increased when it comes to reliably cold hardy Agapanthus cultivars, Storm Cloud is still considered to be one of the most reliable, naturally winter dormant cultivars but it will benefit from a breathable mulch in any area that experiences freezing temperatures for extended periods. Somewhat drought resistant once well-established but generally prefers an average moist, fertile, well-drained soil in a full to mostly sunny site. Deer and rabbit resistant and moderately salt tolerant. Makes an easy and low maintenance container plant where not hardy. Item# 1144

Dense rounded clusters of starry periwinkle blue flowers are produced in late spring to early summer atop the fine-textured deep green foliage that transforms to a deep golden yellow in fall. String Theory Blue Star, a hybrid of or selection of Amsonia hubrichtii, has all of the wonderful traits of Arkansas Blue Star but with a more refined compact habit. This is a clump-forming, long-lived, herbaceous native perennial with an almost formal habit at maturity reaching about 18-24"H x 30-36"W. It can be utilized as an informal hedge or backdrop and will look great paired with native grasses in fall. This Proven Winners© selection is tough and easy, low-maintenance, sunloving, heat tolerant, and deer and rabbit resistant. The flowers of the Blue Stars attract larger bees, butterflies, hummingbirds, and hummingbird moths. Images courtesy of Walter's Gardens, Inc., all rights reserved. Item# 12891

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Suwanne Blue-Eyed Grass produces a profusion of sky-blue, 3/4" wide miniature iris-like flowers for weeks in spring. A clump forming Iris-like native perennial, Suwanne is considered one of the best Blue-Eyed Grasses for gardens with its long flowering season and mannerly habit. Suitable for sun or light shade. Item# 10589

Often throughout summer, small, fragrant beautiful bell-shaped nearly white to blue flowers with gracefully recurving 'petals' (in Clematis it is the large colorful sepals that we often most enjoy) of light blue, blue, or purple. Grow the Swamp Leather Flower as a small perennial herbaceous vine that may top out at 5' but can reach 9' high. It can be cut back to 1-2' in later winter after the buds have begun to swell. Item# 10224.

Royal purple, 1/2" blooms that are edged in white lace, are born in drooping clusters from spring or early summer until frost and attract butterflies and bees. The nectar rich flowers are followed by grape-like clusters of 1/2" golden berries giving it the name of 'Golden Dewdrop'. Sweet Memories Purple Sky Flower is naturally a large multi-stemmed tropical shrub and can be trained into tree standards or use it as a hedge or screen in mild winter climates. In mild winters in zones 8B and 9, well-established plants may act as a die-back perennials or they can easily be overwintered as a container plants. Item# 579

Clusters of deep blue 2" long pointed buds open to long-lasting tubular deep blue flowers that eventually fade to purplish-blue with the show beginning in early to midsummer and continuing into fall. True Blue Gentian is a hardy clump-forming perennial that develops into a well-branched 18-24"H x 12-18"W plant. A Darrell Probst is an open pollinated hybrid of Gentiana makinoi that is reported to be hardy into zone 8. True Blue Gentian does best in a full sun in areas with cooler summers and will likely need part shade where summers are hot. Provide it with a well-drained, average moist soil for optimum vigor and flowering. Makes a long-lasting cutflower as well as true blue addition to the garden and landscape. Image courtesy of AG3, Inc., all rights reserved. Item# 12286

Large intense deep blue flowers emerge from tall spikes beginning in spring and continuing throughout the growing season and into fall. Van Remsen Salvia, an Anise Sage or chance hybrid, is an excellent nectar plant for hummingbirds and may also be visited by larger butterflies. Unlike many of the Salvia guaranitica selections available Van Remsen is a clump forming vigorous growing perennial that can hit 7' high bringing the flowers closer to the hummingbirds and towering over most other garden perennials. This cultivar was discovered in the garden of James Van Remsen of Louisiana and was named and introduced by Salvia guru Richard Dufresne of North Carolina. Provide a full to mostly sunny location in an average moist, well-drained soil for optimum vigor and flowering. Item# 12118

Large creamy yellow, white, and green foliage acts as the backdrop for large hanging clusters of 3" wide, sky blue trumpet shaped flowers that are produced on new growth throughout the summer and into fall. The Variegated Blue Sky Vine is a vigorous twining tropical vine that revels in the warmth of summer and this form appears to be just as vigorous and sun loving as the solid green form. Evergreen in frost free locations, establish in spring once the danger of frost has past as a die-back perennial vine in zones 8-9, or it can easily be maintained as a container plant where not hardy. Item# 1234

A rare and unusual evergreen hydrangea-like shrub with deep green quilted foliage which is topped by clusters of blue blooms from summer to fall. Easy to grow and an excellent choice for shaded gardens. Item# 9312

Large rounded clusters of flowers (sterile florets) in deep rosy pink or medium blue-purple, depending on your soil's acidity and the availibilty of aluminum, adorn the tidy compact well-branched plants with strong sturdy stems and dark green healthy foliage and are produced from summer to fall. Wee Bit Giddy® Bigleaf Hydrangea is a dwarf and compact, has good cold hardiness, and is a repeat flowering mophead that flowers both on this year's and last year's growth. Its tidy rounded, 2' high by 2 -1/2' wide size make it well suited for use in both containers and in gardens with limited space but it is no less useful in gardens and landscapes providing summer to fall color. As with other Bigleaf Hydrangeas, provide this Proven Winners® Color Choice® selection with a moist, well-drained, fertile soil in an area that receives morning sun with shade or filtered shade during the hottest portion of the day in areas with hot summer climates. In cooler climates Bigleaf Hydrangeas can tolerate full to mostly sunny sites. Some direct sunlight, preferably >4 hours per day, is needed for good bud and flower production. Photo courtesy of Proven Winners - www.provenwinners.com, all rights reserved. Item# 12911

Large rounded clusters of flowers (sterile florets) in deeply saturated shades of rosy red or blue-purple, depending on your soil's acidity and the availibilty of aluminum, adorn the tidy compact well-branched plants with dark green healthy foliage from summer to fall. Wee Bit Grumpy® Bigleaf Hydrangea is a dwarf and compact, has good cold hardiness, and is a repeat flowering mophead that flowers both on this year's and last year's growth. Its tidy rounded, 2' high by 2 -1/2' wide size make it well suited for use in both containers and in gardens with limited space but it is no less useful in gardens and landscapes providing summer to fall color. As with other Bigleaf Hydrangeas, provide this Proven Winners® Color Choice® selection with a moist, well-drained, fertile soil in an area that receives morning sun with shade or filtered shade during the hottest portion of the day in areas with hot summer climates. In cooler climates Bigleaf Hydrangeas can tolerate full to mostly sunny sites. Some direct sunlight, preferably >4 hours per day, is needed for good bud and flower production. Photo courtesy of Proven Winners - www.provenwinners.com, all rights reserved. Item# 12910

A crown of deep sapphire blue filaments create a striking contrast with the white petals and sepals that are held against the rich green foliage throughout the growing season. The Blue Crown Passionflower is a vigorous growing tropical vine and can easily reach 20' once well-established. This is also one of the most reliably cold hardy Passionvines with foliage remaining evergreen in the mildest 8B winters but dying back to the ground in severe winters and returning readily in spring. The Blue Crown Passionflower may spread somewhat by rhizomes but it is generally much more tame than the Maypop. Cross pollination may produce tropical tasting tangy fruit that surrounds the dark seeds inside. Click on "More Details and Growing Info" or the image to learn more about growing Passionvines as perennials in containers or in the garden and landscape. Item# 733

Only one of two Amsonia species to receive a 5-star rating in the Chicago Botanic Gardens trials! Showy clusters of light blue star-shaped 1" wide flowers are produced in spring atop sturdy stems cloaked in dark green willow-like foliage. The Willowleaf Eastern Bluestar has the same basic habit and growth requirements of the more common Eastern Bluestar, Amsonia tabernaemontana var. tabernaemontana, but with larger showier flower clusters that seem to cover the plant, a neat dense vase-shaped habit, and clean disease resistant foliage. An easy to grow, clump-forming native perennial that is tolerant of wet to average moist soils preferring a full to mostly sunny site in the garden and landscape. The flowers of Bluestars attract butterflies and hummingbird moths. Images courtesy of North Creek Nurseries, all rights reserved. Item# 11945

A rare and more robust Evergreen Chinese Hydrangea with larger leaves, thick sturdy stems, and larger individual flowers creating larger clusters of the unusual vivid blue blooms.  Easy to grow and an excellent choice for shaded gardens. Item # 9317.

The large, fully double, sterile florets emerge either light pink (alkaline soils) or light blue (acidic soils with Aluminum) and deepen to rosy pink or deep blue as they age and can ultimately become red or deep purple in fall and winter. YOU&ME® Together Bigleaf Hydrangea was selected not only for its double flowers that are produced continuously throughout the growing season atop sturdy stems but also for its dense compact habit that lends it to use as a container specimen. It is equally useful in the garden and landscape for continuous color.  As with other Bigleaf Hydrangeas provide a moist, well-drained soil in an area that receives morning sun and shade during the hottest portion of the day, at least in hot summer climates. Images courtesy of Concept Plants BV®, all rights reserved. Item# 12481