Blue Flowers or Flower Parts

Flat topped clusters of bluish-purple Ageratum-like flowers are born atop sturdy stems in summer and sometimes into fall. Blue Mistflower is a rhizomatous colonizing native perennial that may be best suited to naturalistic settings or among larger growing plants as a tall groundcover. Excellent for pollinators, particularly native bees. Item# 10458

Large clusters of lightly fragrant lavender-blue flowers are produced in early spring and are held well above the deep dark green foliage. Blue Moon Phlox was selected for its clusters of large full flowers and vigor. This is an excellent choice for lightly shaded gardens or as a groundcover under deciduous trees. Provide shade during the hottest portion of the day in hot summer climates and well-drained soil rich in organic matter. Easy and reliable once established. The flowers provide early spring nectar to butterflies and other pollinators. Item# 11217

Bluish-purple 3" trumpets are borne in succession throughout summer and into fall on this upright to loosely open and spreading shrub-like tropical. The Morning Glory Bush is considered root hardy throughout much of zone 9. Provide your plants with a warm protected site, a well draining soil, and extra protection during hard or extended freezes for the best results. In frost-free climates the Morning Glory Bush can develop into a loose open shrub. Item# 329

2022 Missouri Botanic Garden Plants of Merit selection! One of the most amazingly blue colored flowers in the plant world! This small growing but vigorous annual or tender perennial vine produces loads of brilliant deep blue flowers with recurving and overlapping petals with a white to creamy yellow throat. It can be successfully overwintered but it's easier just to save a few seeds to plant in spring. Item# 9114

Blue dye can be extracted from the blossoms!!

Deep indigo 1/4" blooms adorn the long spike-like bloom stems from spring to frost above the rich green glossy foliage. Blue Porterweed is an intermediate growing Porterweed and has a fairly dense upright habit. An excellent choice for butterfly gardens or in containers. Also known as Blue Snakeweed, Verbena Azul, Cayenne Snakeweed. Item# 330.

Light blue to blue-purple 1/4" wide nectar-rich flowers adorn the tall narrow indeterminate flower spikes from spring to frost to year round under warm tropical conditions. Native to Florida and much of the tropical Americas, Blue Porterweed, Stachytarpheta jamaicensis, has smoother lighter green foliage and generally grows wider than tall whereas the other Blue Porterweed, Stachytarpheta cayennensis or S. urticifolia, has more rugose or quilted deeper green glossier foliage with a typically upright habit. Porterweeds are excellent pollinator plants where they attract a continuous menagerie of aerial acrobats from spring until frost. This a heat and sunloving tropical to tender perennial that can be added to gardens and landscapes or plant them in containers to draw the pollinators in for upclose viewing. Blue Porterweed is also a caterpillar host plant for the Tropical Buckeye butterfly. Item# 12046

Clusters and chains of large 3" wide purple-blue trumpet shaped flowers with contrasting yellow throats are produced throughout much of the growing season and attract larger bees and butterflies as well as the occassional hummingbird. The Blue Sky Vine, Thunbergia grandiflora, is an exceptionally popular tropical vine that is easy, reliable, has excellent flower power and it can be grown as a die-back perennial in zones 8-9 if established early in the growing season (click the "More Details and Growing Info" link or the plant's image to learn more). It may remain evergreen in warm frost free tropical climates where it can flower nearly yearround. The Blue Sky Vine is a heat and sunloving twining vine suitable for metal fences, smaller arbors, and medium to large trellises or other sturdy supports. Provide a well-drained, moderately fertile soil. The Blue Sky Vine can also be enjoyed as an easy and low-maintenance container plant. Item# 1108.

Pale blue frilly 1 to 1-1/2" wide daisies with a nicely contrasting yellow center are produced beginning in late spring and through summer often continuing into fall atop a neat mound of deep green foliage. The Blue Star Japanese Aster is a tidy under-used clump-forming perennial selected for its exceptionally long flowering season that is sure to add delightful color to the garden and landscape but it also makes easy and exceptionally long-flower container specimens. The flowers are sure to attract a multitude of pollinators. Provide a full to mostly sunny site with a well-drained soil for optimum vigor and flowering. Heat, sun, and humidity tolerant. Images courtesy of North Creek Nurseries, all rights reserved. Item# 11682

Deep purplish blue Iris-like flowers are produced on 2' high spikes are held above the upright to arching dark-green, textured sword shaped foliage. Blue Stars often begins flowering in spring and continues into summer. The overall appearance of this hardy rhizomatous African native is like an overgrown Blue-Eyed Grass. Blue Stars is a naturally evergreen clump forming perennial but the foliage my die back at temperatures below 20oF. Provide good drainage in an average moist rich soil with shade during the hottest portions of the day in hot summer climates. Makes an easy container plant where not hardy. Item# 11019

Dense broadly conical 3-4" high spikes of intense sapphire blue tubular flowers open from the bottom upwards with the first flowers to open creating the broad brim of the witches hat. Blue Witches Hat, or Hedgehog Sage, begins flowering in autumn and in areas where it is protected from frosts it can flower throughout winter and into spring. It is a medium to short day flowering plant. This tropical South African member of the mint family can develop into a shrub where winters are freeze and frost free reaching up to 8' high, 3-4' high in a container is more typical. Item# 11750

The widely flaring deep blue-purple fan shaped flowers open from tubular buds, and are very reminiscent of Scaevola or Half-Flower, open singly and in clusters held at the growing tips as well as in the leaf axils attracting bees, butterflies, and hummingbirds. The 5-lobed flowers of Blue-Lips, Sclerochiton harveyanus, are produced most heavily throughout the warmer months of the year. This is a shade tolerant naturally spreading to scandent (vine-like) evergreen tropical shrub with rounded, glossy deep green foliage. Blue-Lips is considered to be frost resistant but not freeze tolerant and it is easily maintained as a shrub form for containers, including hanging baskets, in and around larger growing shade-loving tropicals in the garden as well as on a shaded porch or patio. Provide it with an average moist, acidic to neutral, well-drained soil in a site that receives at least some cool morning sunlight or filtered sunlight for optimum vigor and flowering. Item# 12268

Clusters of starry light blue flowers are produced in late spring to early summer atop the fine-textured foliage that transforms to a rich butterscotch yellow adorning contrasting red stems in fall. Butterscotch® Arkansas Bluestar, a hybrid of or selection of Amsonia hubrichtii, boasts richer fall color, flower petals that extend outward, instead of recurving backwards, makng the flowers seem larger, and has good disease resistance. This is a clump-forming, long-lived, herbaceous native perennial with an almost formal habit at maturity reaching about 3'H x 4'W. It can be utilized as an informal hedge or backdrop and will look great paired with native grasses in fall. Butterscotch Amsonia is easy, sunloving, heat tolerant, and deer and rabbit resistant. Images courtesy of Emerald Coast Growers, all rights reserved. Item# 12890

.

The 3" wide, cornflower-like daisies open white, slowly work their way through shades of lavender, and finally deepen to a violet blue creating a rainbow of cool-colored flowers even on the same flower stalk. Colorwheel Stokesia is just as tough and reliable as its brethren creating a mound of foliage on a durable and dense clump forming native perennial. Stokesia Daisy is one of those plant it and forget it perennials, once they become established in nearly any garden or landscape they require almost no additional care. Image courtesy of North Creek Nurseries. Item# 10928.

Costa Rican Blue Salvia produces large spikes of exceptionally large bluish purple tubular flowers that emerge from darkly colored calyxes in summer and fall above the soft, somewhat bluish green foliage. Considered by some to be a selection of Salvia guaranitica, and possibly a tetraploid or hybrid, it differs in its larger more robust habit, larger flowers that start later in the summer, and its very pubescent foliage. Excellent for hummingbirds and other long tongued pollinators. Provide a full sun to part shade location in an average moist to moist acidic well-drained moderately fertile soil for optimum vigor and flowering. Item#10233

Tall dense spikes of light blue-purple tubular flowers are held above the licorice-scented deep green foliage that is neatly edged in bright white. The nectar rich flowers are produced throughout the growing season and attract a seemingly endless procession of bees, butterflies, and other pollinators. Crazy Fortune Anise Hyssop, a selection of the award winning Blue Fortune, is a clump-forming herbaceous perennial with an upright bushy habit maturing to about 2-3'H and half as wide. The variegated foliage will be most noticeable where plants are upclose and personal making this an easy choice for containers on a sunny deck or patio or near the front of the garden or landscape. Provide a well-drained, fertile, average moist soil in a full to mostly sunny location for optimum vigor and flowering. Images courtesy of Concept Plants BV®, all rights reserved. Item# 13161

Jack in the Bush or Crucita is truly one of the very best butterfly plants! The nectar rich, light blue to purple, flat topped flower clusters make perfect landing platforms for pollinators of all shapes and sizes. Crucita can be found in flower as early as mid summer to late fall. Item# 10670.