Thunbergia alata Susie™ Clear White

Elevate Your Garden with the Splendor of Thunbergia alata Susie™ Clear White: The Enchanting Black-Eyed Susan Vine

Unveiling the Allure of the Sunny Susy® Series: Gardening aficionados, prepare to embark on a journey through the wondrous world of Thunbergia alata Susie™ Clear White, affectionately known as the Black-Eyed Susan Vine. This remarkable member of the ‘Sunny Susy®‘ Series is more than just a vine; it’s a living masterpiece that graces gardens with its radiant presence. The Black-Eyed Susan Vine (Thunbergia alata Susie™ Clear White) belongs to the family Acanthaceae. This family includes a wide range of flowering plants, many of which are known for their colorful and distinctive blossoms. Let’s unravel the secrets of its striking white blossoms and robust climbing nature.

Sunny Susy® Series: A Blossom-Filled Marvel

The Sunny Susy® Thunbergia series stands as a testament to nature’s splendor. These vigorous climbing vines thrive under the sun’s warm embrace, showering your garden with a kaleidoscope of colors throughout the season. Scaling heights of six feet or more in a single growing season, they effortlessly double as both a natural screen and a visual delight.

The Mesmerizing White Halo Blossoms

One of the Black-Eyed Susan Vine’s most captivating features is its large, pristine white flowers adorned with bewitching dark centers. These blooms reach their zenith during the scorching days of high summer, flourishing in rich, humus-rich soils. A hint of afternoon shade offers respite in regions with relentless heat.

A Journey to Tropical Eastern Africa

Hailing from tropical eastern Africa, Thunbergia alata Susie™ Clear White possesses an innate vigor that enables it to soar to heights of 3 to 8 feet within a single growing season. These vines, however, aren’t overly fond of drought, so regular watering is essential for optimal growth. With a diverse array of species and dazzling colors, Thunbergia is a versatile choice, adorning window boxes, mixed containers, trellises, arbors, and even fences around your abode. Its floral display typically unfolds from late spring through fall.

Plant Profile

  • Plant Habit: Vine
  • Life Cycle: Perennial
  • Sun Requirements: Full Sun to Partial Shade

Soil pH Preferences

Thunbergia alata Susie™ Clear White thrives in soils with a slightly alkaline pH ranging from 7.4 to 7.8.

Cold Hardiness

This remarkable vine boasts the endurance to withstand minimum cold temperatures found in Zone 10a (-1.1°C or 30°F) to Zone 11 (+1.7°C or 35°F).

Key Characteristics

  • Plant Height: 4 to 6 feet
  • Leaves: Evergreen
  • Flowers: Showy
  • Flower Color: White
  • Bloom Size: 1″-2″
  • Flower Time: Summer, Late Summer, or Early Fall
  • Uses: Suitable as an Annual
  • Wildlife Attractant: Bees, Butterflies
  • Resistances: Humidity Tolerant

Propagation Methods

Thunbergia alata Susie™ Clear White can be propagated through seeds or cuttings, providing you with various options for growing this beauty in your garden:

  • Seeds: Sow the seeds at a specific temperature of 65-70°F, and anticipate germination within 7 to 21 days. Plant seeds 1/4 to 1/2 inch deep directly in your chosen location.
  • Cuttings: In the fall, while the plant is actively growing, snip 4- to 6-inch segments of healthy stem just below a stem node. Plant these cuttings in small containers filled with ordinary potting mix, without covering. Position the containers in a bright, warm location, such as a sunlit window. In spring, when outdoor temperatures reliably exceed 60°F, transplant the rooted cuttings into your garden or outdoor containers.

Cultivating Thunbergia alata Susie™ Clear White:

Thunbergia alata Susie™ Clear White thrives in rich, well-draining soil, basking in sunny locations. To support its climbing prowess, provide a trellis or structure for it to grasp. These vines have a knack for twining around supports or gracefully cascading over planter edges. They’re perfect for hanging containers and can elegantly drape over walls and raised garden beds. From lattice to metal fences, and mailbox poles to old tree stumps, this adaptable plant flourishes in various settings.

Caring for Your Black-Eyed Susan Vine

To ensure your Black-Eyed Susan Vine thrives, here are some essential care tips:

Light: Plant in full sun for optimal growth, except in hot, arid regions where partial afternoon shade is recommended.

Soil: Provide well-draining soil with a slightly alkaline pH between 7.4 and 7.8. Consider enriching the soil with compost before planting.

Water: Maintain moderately moist soil. Mulching around the base of the plant helps keep roots cool and moist. As a general rule, aim for 1 inch of water per week, adjusting based on weather conditions.

Temperature and Humidity: Suitable for USDA hardiness zones 10 to 11, but can be grown as an annual or container plant in colder regions. Indoor plants require ample sunlight and temperatures above 60°F.

Fertilizer: Feed every four to six weeks with a complete fertilizer to support their vigorous growth and abundant blossoms.

Growing Black-Eyed Susan Vine From Seed

While growing from seed is an option, it presents a bit of a challenge due to the nature of the seeds. Here’s how to do it:

  • Soak the hard seeds in water for a day or two before planting.
  • Begin indoors approximately six to eight weeks before the last frost or direct seed after the frost danger has passed.
  • Plant seeds about 1/4 inch deep in peat or paper pots that biodegrade when planted with the seedlings.
  • Expect germination within two to three weeks.

Potting and Repotting Black-Eyed Susan Vine

This versatile plant is perfect for hanging baskets, window boxes, or large mixed containers, cascading gracefully. Utilize any well-draining commercial potting mix for containers. Hanging baskets often accommodate two or three plants in a 10- to 12-inch plastic pot, suspended with wires for climbing.


When grown as an annual, simply remove plants in late fall to prevent self-seeding. In regions where it can be grown as a perennial, continue watering and feeding through the winter.

Common Pests & Plant Diseases

Black-Eyed Susan Vine rarely faces issues, particularly when provided with ample sunlight, water, and air circulation. However, remain vigilant for whiteflies and spider mites, especially during hot weather or when transitioning plants indoors with dry heat. Swiftly address outbreaks with insecticidal soap.

While Black-Eyed Susan Vine seldom causes complaints, gardeners in warm-weather regions might find it self-seeds generously, occasionally leading to invasiveness. In colder zones, volunteers may appear around previous growth areas, but they are easily managed and don’t persist.

How to Get Black-Eyed Susan Vine to Bloom

Achieving vibrant blooms is usually a breeze, provided basic needs are met. Abundant sunlight, proper watering, and regular fertilization are key to an extended flowering season.

Thunbergia alata Susie™ Clear White
Thunbergia alata Susie™ Clear White

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