THUNBERGIA alata (Black-Eyed Susan Vine) is a popular flowering vine valued for its striking blooms and vining growth habit. Despite its common name, it is not closely related to the true Black-Eyed Susan (Rudbeckia hirta). Thunbergia alata belongs to the Acanthaceae family and is native to tropical regions of Africa. It is often cultivated as an annual or perennial in various parts of the world for its colorful flowers and ability to climb or trail on supports.
Black-Eyed Susan Vine is a fast-growing, twining vine that can reach a height of 6 to 8 feet (1.8 to 2.4 meters) or more. It has heart-shaped leaves that are medium green in color and slightly hairy. The flowers are the main attraction, and they come in a range of colors, including yellow, orange, white, and apricot. The flowers have a dark center or "eye" in the form of a contrasting color, which gives the vine its common name.
This species is native to tropical regions and thrives in warm and sunny environments. It prefers well-draining soil and benefits from a support structure, such as a trellis, fence, or arbor, for climbing or trailing.
The flowers of Thunbergia alata are trumpet-shaped and about 1 to 2 inches (2.5 to 5 centimeters) in diameter. They typically have five petals and a dark-colored center, which can be black, brown, or a contrasting color. The flowers are produced abundantly, creating a vibrant display that attracts bees, butterflies, and hummingbirds.
Black-Eyed Susan Vine is often used to add vertical interest and vibrant color to garden landscapes. It is suitable for growing on trellises, fences, arbors, or as a ground cover. It can also be grown in hanging baskets or containers, cascading down with its trailing growth habit. The vine's colorful flowers and lush foliage make it an attractive addition to gardens, balconies, or patio spaces.
Black-Eyed Susan Vine, with its showy flowers and climbing or trailing habit, is a versatile and eye-catching plant for adding vertical interest and vibrant color to garden settings. Its fast growth, ability to attract pollinators, and range of available flower colors make it a popular choice among gardeners seeking to create a lush and colorful display.
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Scientific Name: Thunbergia Alata
Common Name: Black-Eyed Susan Vine
Plant Type: Tender Perennial, Climbers
Native Range: Tropical Africa
Full Growth Height: 36-96"
Width in Across: 36-72 "
Exposure: Full Sun to Partial Shade
Blooming Season: Summer (Early, Mid, Late), Fall
Flower: Showy, Evergreen
Flower Color: Yellow-Orange
Tolerate: Drought, Rocky Soil, Dry Soil
Water Requirement: Average
Soil Type: Sand, Loam, Chalk, Well-Drained, Moist
Soil pH: Acid, Alkaline, Neutral
Uses: Annual, Ground Cover, Informal and Cottage Gardens, Mediterranean Garden