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Trees That Bloom in August in Zone 6

U.S. Department of Agriculture Plant Hardiness Zone 6 comprises a wide swath of the United States, from eastern Massachusetts into Kentucky, westward through New Mexico then northwest into Washington. The trees available for landscaping purposes that begin to bloom, or are still in bloom, during August are few, but options exist. Most are nonnative to North America, but some are native species up to the job of surviving in a zone where winter temperatures may reach 10 degrees below zero.
  1. Types and Geography

    • Chitalpa (X Chitalpa tashkentensis) is a hybrid cross between the southern catalpa and the desert willow. Zone 6 is the coldest zone where chitalpa may grow. The Franklin tree (Franklinia alatamaha) grows wild in the Southeast, as does the southern magnolia (Magnolia grandiflora). Both produce flowers in August and handle Zone 6 weather. Nonnative species for this function include the haragiri (Kalopanax septemlobus), a tree from Korea and China, and the goldenrain tree (Koelreuteria paniculata), a Japanese/Chinese import. The Japanese pagoda tree (Sophora japonica) originates from Korea and China, but not Japan. The bee-bee tree (Tetradium daniellii) is also from Korea and China; both these species are suitable for Zone 6 and generate August flowers.

    Size

    • Within Zone 6, these flowering trees attain an array of sizes. The southern magnolia grows to 75 feet high, making it appropriate for large landscapes. The Japanese pagoda tree ranges between 50 and 75 feet tall when fully mature. The Franklin tree is much smaller at between 10 and 20 feet, giving it versatility in regards to its uses. The bee-bee tree is somewhat bigger at up to 30 feet, while the chitalpa grows to 35 feet. Haragiri is a medium to large flowering sort, developing to between 40 and 60 feet. Goldenrain tree stays between 30 and 40 feet.

    Flowers

    • August marks the end of the blooming period of chitalpa, as its bell-shaped white and pink flowers soon start to fade away. Southern magnolia blooms from May through September, with its white flowers as wide as 12 inches. The Franklin tree produces its 3-inch-wide white flowers in July and August. The centers look like a yellow egg yolk. The pealike white flowers of Japanese padoga trees emerge in July and last into August. Goldenrain tree's brilliant yellow blossoms open up in August and continue blooming into September. Haragiri generates clusters of small, white flowers into August, while the bee-bee tree, so named because bees buzz about its white flowers, blooms during July and August.

    Uses

    • Employ the goldenrain tree on your patio or lawn. It is a good choice for urban settings because it tolerates pollution. Southern magnolia and Japanese pagoda trees require open spaces in which to grow. "Regent" is a cultivar of Japanese pagoda that grows quicker and flowers at an earlier age. Bee-bee tree withstands light shade. Use it in woodland gardens. The haragiri works as a shade tree, notes the Missouri Botanical Garden. Situate a Franklin tree in your landscape where its flowering effect has an audience. Chitalpa is a specimen tree for full sun or partial shade scenarios.