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Description
Borthwickia is a monotypic genus of flowering plants in the family Hydrangeaceae. The only species in this genus is B. trifoliata, which is commonly known as the three-leaved Borthwickia. This evergreen shrub is endemic to Southeast Asia, including Thailand, Laos, Myanmar, and Malaysia. It can grow up to 10 meters tall and has a diameter of about 5 centimeters. Borthwickia is popular for its unique and attractive appearance, which makes it a great addition to any garden.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Cornales |
| Family | Hydrangeaceae |
| Genus | Borthwickia |
| Species | B. trifoliata |
Appearance
Borthwickia has unique, three-leafed foliage that appears almost like bamboo. The leaves are shiny, dark green, and leathery. They are approximately 15-30 cm long and 5-8 cm wide. The plant produces small yellow flowers that grow in clusters, which bloom from September to November. The fruit is a small, round, green capsule that contains tiny black seeds. The plant’s trunk is straight and slender, with a smooth, gray bark that is easily damaged.
Care Guide
Water: Borthwickia requires moderate watering. Avoid overwatering or letting the soil dry out completely. Water the plant when the top layer of the soil is dry to the touch.Fertilization: Feed Borthwickia with a slow-release fertilizer during the growing season. Apply the fertilizer every 4-6 weeks, following the manufacturer’s instructions.Soil: Borthwickia prefers well-draining soil that is rich in organic matter. It can grow in acidic, neutral, or alkaline soil.Sunlight: Borthwickia thrives in partial shade to full sun. It can tolerate full shade, but it may not bloom as much.Hardiness Zones: Borthwickia can grow in USDA hardiness zones 9-11.
Common Pests & Diseases
Borthwickia is relatively pest and disease-resistant. However, it can be susceptible to root rot if overwatered. Spider mites and scale insects may also infest the plant. Use insecticidal soap or neem oil to control these pests.
Habitat
Borthwickia is native to Southeast Asia, where it grows in tropical and subtropical climates. It can be found in lowland forests and along riverbanks. In its natural habitat, Borthwickia grows in well-draining soil that is rich in organic matter.
Question and Answer
Q: Can Borthwickia grow in full shade?A: Borthwickia can grow in full shade, but it may not bloom as much.Q: How often should I water my Borthwickia?A: Water your Borthwickia when the top layer of the soil is dry to the touch. Avoid overwatering or letting the soil dry out completely.Q: What is the hardiness zone for Borthwickia?A: Borthwickia can grow in USDA hardiness zones 9-11.Q: What kind of soil does Borthwickia prefer?A: Borthwickia prefers well-draining soil that is rich in organic matter. It can grow in acidic, neutral, or alkaline soil.
Related Plants
Here are some related plants to consider:
- Hydrangea
- Deutzia
- Fothergilla
- Philadelphus
References
- Flora of Thailand: Borthwickia trifoliata.
- Hydrangeaceae Borthwickia trifoliata
