African hemp (Sparmannia africana)
African hemp
About this plant
Sparmannia africana, commonly known as African hemp, is a fast-growing shrub with large, soft, bright green leaves that resemble those of the hibiscus. It produces small, white, hibiscus-like flowers that open in the morning and fade by afternoon. The plant is valued for its attractive foliage and air-purifying qualities, making it a popular indoor and greenhouse plant.
Taxonomy
Higher classification: Order Malvales
Origin & Distribution
- Native region
- South Africa, Mozambique, Zimbabwe
- Distribution
- Native to southern Africa, it is cultivated worldwide as an ornamental plant in homes and greenhouses.
Care
- Suitable locations
- Indoor, Greenhouse, Balcony
- Preferred window facing
- East-facing, South-facing, West-facing
- USDA hardiness zones
- 9-11
- Soil pH
- 6.0-7.5 (slightly acidic to neutral)
- Soil type
- well-draining potting soil mix
Watering. Water regularly to keep the soil evenly moist but not waterlogged. Allow the top inch of soil to dry out between waterings. Reduce watering in winter when growth slows.
Fertilizing. Feed Sparmannia africana every 2-4 weeks during spring and summer with a balanced liquid fertilizer diluted to half strength. Reduce feeding in fall and winter when growth slows.
Sparmannia africana is a fairly easy plant to care for. It prefers bright, indirect light but can tolerate some shade. Keep the soil moist but not soggy, and avoid letting it dry out completely. It benefits from regular feeding during the growing season and occasional pruning to maintain shape.
Propagation
- Propagation methods
- Seeds, Cuttings
Ornamental features
- Flowering
- Yes
- Flowering period
- summer
Large soft green leaves and delicate white hibiscus-like flowers that bloom in summer mornings.
Toxicity & Safety
Non-toxic to humans and pets, but sap may cause mild skin irritation. Wash hands after handling.
Allergy information
Sparmannia africana may cause mild skin irritation in sensitive individuals due to its sap. It does not produce airborne pollen that typically triggers allergies. To reduce risk, avoid direct contact with the sap and wash hands after handling the plant.
Common problems
Overwatering can cause root rot, while too little water leads to drooping leaves. Low light may reduce growth and flowering. Pests like spider mites or aphids can occasionally appear.
Uses
Primarily grown as an ornamental houseplant for its attractive foliage and flowers. It also helps improve indoor air quality.
Notes
Prune lightly after flowering to encourage bushier growth. Repot every 2-3 years to refresh soil and accommodate growth. Protect from cold drafts and temperatures below 10°C (50°F).