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Blue Flowering Plants for Hanging Baskets

Hanging baskets add another level of interest to a landscape, displaying plants at eye level. For porches and patios, baskets help create boundaries along the edges, filling the gap between ceilings and railings or lower plantings. Use blue flowers alone in a hanging basket, combine them with white flowers for crisp contrast or use them to separate warm colors of red or yellow flowers. Use well-draining organic mixes and pay special attention to watering needs during warm months, watering daily if necessary.
  1. Light Blue Flowers

    • Nierembergia "Blue Mountain" (Nierembergia hippomanica "Blue Mountain") is useful for fall bloom. Cup-shaped, pale azure flowers are abundant on plants with a 1- to 2-foot height and spread. "Blue Mountain" grows in full sun or partial shade. Star-shaped, pale blue-violet flowers of "Cascade Sky Blue" Browallia (Browallia americana "Cascade Sky Blue") are 1/2-inch wide. Abundantly produced from early spring to fall, plants form a compact yet trailing 1- to 2-foot mound and grow in either sun or shade.

    Medium Blue Flowers

    • "Summer Wave Blue" wishbone flower (Torenia "SUNrenilabu") produces showy, blue, tubular flowers in abundance, attracting hummingbirds. This tender perennial is treated as an annual since it is hardy only to U.S. Department of Agriculture plant hardiness zones 10 and 11. It blooms from early summer into fall. Although often grown as a climbing vine, twining snapdragon (Asarina scandens) works equally well spilling from a hanging basket. The variety "Sky Blue" produces flaring, snapdragon-like blue flowers in late summer and fall.

    Deep Blue Flowers

    • For vivid, intense blue flowers, varieties of trailing lobelia (Lobelia erinus) are hard to beat. "Blue Moon" bears dark blue flowers, and "Crystal Palace" has deep flower color combined with bronzy foliage. Plants grow 3 to 10 inches tall and can spread 1 to 2 feet wide. Showy flowers are small but produced in abundance. Great strides are being made in breeding petunia (Petunia hybrids). Plants are long-blooming, more floriferous and compact and don't need deadheading. Look for the Surfinia mounding petunia "Patio Blue" or Supertunia "Double Dark Blue." These heat-tolerant plants make dramatic hanging basket displays.

    Perennials

    • Clear blue flowers of evolvulus "Blue Daze" (Evolvulus glomeratus "Blue Daze") have a small white spot centering on the flower's throat. Related to morning glory, flowers tend to close in the afternoon. The plant is hardy to U.S. Department of Agriculture plant hardiness zones 9 and 10 and is treated as an annual in colder areas. Gray-green foliage produces masses of flowers on plants 12 inches tall and wide. Blue pimpernel (Anagalis monellii) has electric blue flowers appearing from early summer through fall on plants hardy to USDA zones 7 and 8. Blue pimpernel prefers full sun and is 6 to 12 inches tall and 1 to 3 feet wide.