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Vine

Thunbergia

Thunbergia alata (and other spp.)

Black-Eyed Susan VineClock VineSky VineBengal Trumpet

Thunbergia are vigorous climbing vines with colorful flowers featuring dark centers. They symbolize timelessness, persistent love, and cheerful determination.

Plant Family

Acanthaceae (Acanthus family)

Blooming

Summer to fall frost (June-October), continuous blooming

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Vibrant Thunbergia vine flowers with distinctive dark centers
Vibrant Thunbergia vine flowers with distinctive dark centers

Symbolism & Meanings

Key Meanings

Timelessness
Persistent love
Cheerful determination
Optimism
Climbing toward goals
Endurance
Bright outlook

Perfect For

Encouragement giftsLong term relationshipsGoal achievementOptimistic beginnings

Color Meanings

Orange:Enthusiastic persistence, creative energy, warmth
Yellow:Optimistic determination, cheerful goals, sunshine
White:Pure intentions, honest persistence, peaceful climbing
Blue:Loyal determination, trustworthy persistence, calm goals

Similar flowers: gaillardias and lantanas also share similar meanings.

Cultural Significance

Named after Carl Peter Thunberg, Swedish botanist. The "clock vine" name refers to the regular, timeless nature of its blooming. Represents persistence and the ability to climb toward one's goals with cheerful determination.

Botanical Information

Physical Characteristics

Flower Size: 1-2 inches diameter (2.5-5 cm), flat-faced with dark center
Plant Size: 6-10 feet long (1.8-3 meters), climbing or trailing
Flower Shape: Five-petaled, flat-faced with prominent dark center, trumpet-shaped tube

Natural Habitat

Native to: Eastern Africa, Tropical Asia, Madagascar
Habitat: Tropical gardens, fences, trellises, containers, greenhouse cultivation
Climate: Tropical, Subtropical, Warm temperate (as annual)

Growing Guide

Sunlight

Full sun to partial shade (minimum 4-6 hours direct sunlight)

Water

Consistent moisture; does not tolerate drought well

Soil

Well-draining, Rich organic matter, Moist, Slightly acidic to neutral (pH 6.0-7.0)

Expert Growing Tips

1

Provide sturdy support for vigorous climbing growth

2

Pinch tips to encourage bushier growth

3

Deadhead regularly to promote continuous blooming

4

Start seeds indoors 6-8 weeks before last frost

5

Water consistently but ensure good drainage

Uses & Benefits

Ornamental Uses

  • Climbing on trellises, fences, and arbors
  • Hanging baskets and container gardens
  • Ground cover in suitable climates
  • Quick summer screening
  • Greenhouse and conservatory specimens

Traditional Uses

  • Some species used in traditional African and Asian medicine
  • Historically used for treating wounds and skin conditions
  • Contains compounds being studied for antimicrobial properties
  • Traditional uses for digestive and respiratory ailments

Disclaimer: Information provided is for educational purposes only. Consult healthcare professionals before using any plant medicinally.

Frequently Asked Questions about the Thunbergia

is thunbergia a perennial or annual?

Thunbergia is a tender perennial that's grown as an annual in temperate climates. In tropical zones, it can be a vigorous perennial vine.

why is it called black-eyed susan vine?

It's called black-eyed susan vine because of the distinctive dark center (like a black eye) in the colorful flowers, similar to the black-eyed susan daisy.

what does thunbergia symbolize?

Thunbergia symbolizes timelessness, persistent love, and cheerful determination. It represents the ability to climb toward goals with optimism and endurance.

how fast does thunbergia grow?

Thunbergia is a fast-growing vine that can reach 6-10 feet in a single growing season, making it excellent for quick coverage of supports.

Available Colors

Orange
Yellow
White
Blue
Purple
Red

Quick Facts

Type:vine
Family:Acanthaceae (Acanthus family)
Native to:Eastern Africa
Blooms:Summer to fall frost (June-October), continuous blooming

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