- Species and varieties: Thunbergia alata, commonly known as Black-eyed Susan vine, is a species of flowering plant in the Acanthaceae family. The red variety is a cultivar of this species, known for its vibrant red flowers with a dark center.
- Hybrid or heirloom: The red Thunbergia alata is typically a hybrid variety, bred for its unique and striking flower color. Hybrid varieties are often chosen for their enhanced traits such as color, growth habit, and disease resistance.
- Pruning and training: Thunbergia alata benefits from regular pruning to encourage bushier growth and more prolific flowering. Pinch back the tips of young plants to promote branching. It can be trained to climb on trellises, fences, or other supports, making it an excellent choice for vertical gardening.
- Fertilization needs: Fertilize Thunbergia alata with a balanced, water-soluble fertilizer every 4-6 weeks during the growing season. Avoid over-fertilizing, as this can lead to excessive foliage growth at the expense of flowers. A slow-release fertilizer can also be used at the beginning of the growing season.
- Hardiness zones: Thunbergia alata is suitable for USDA hardiness zones 10-11. In these zones, it can be grown as a perennial. In cooler climates, it is often grown as an annual or in containers that can be brought indoors during colder months.
- Climate requirements: This plant thrives in warm, sunny climates with temperatures ranging from 60°F to 80°F (15°C to 27°C). It prefers full sun to partial shade and requires well-drained soil. It is moderately drought-tolerant once established but performs best with regular watering.