Java Glorybower (Clerodendrum speciosissimum)
Speciosissimum
About this plant
Clerodendrum speciosissimum, commonly known as Java Glorybower, is a tropical shrub admired for its large, bright red tubular flowers that attract hummingbirds and butterflies. It has lush green leaves and can grow into a dense bush, making it a popular ornamental plant in gardens and landscapes. It is native to Indonesia and thrives in warm climates.
Taxonomy
Higher classification: Order Lamiales
Origin & Distribution
- Native region
- Indonesia
- Distribution
- Widely cultivated in tropical and subtropical regions worldwide, including Southeast Asia, parts of Central and South America, and warm areas of the United States such as Florida and California.
Care
- Suitable locations
- Outdoor, Balcony, Greenhouse
- 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 loam, rich in organic matter
Watering. Water regularly to keep the soil moist but not soggy. Allow the top inch of soil to dry out between waterings to prevent root rot.
Fertilizing. Feed with a balanced, water-soluble fertilizer every 4 to 6 weeks during the growing season (spring through summer) to support healthy growth and flowering.
This plant grows quickly and prefers bright sunlight but can tolerate some shade. It needs regular watering but should not sit in waterlogged soil. Watch for pests like aphids and spider mites, and prune to maintain shape and encourage flowering.
Propagation
- Propagation methods
- Cuttings, Layering
Ornamental features
- Flowering
- Yes
- Flowering period
- summer
Large bright red tubular flowers, lush green foliage, bushy form
Toxicity & Safety
Not known to be toxic to humans or pets, but avoid ingestion and contact with sap to prevent mild irritation.
Allergy information
Clerodendrum speciosissimum may cause mild skin irritation in sensitive individuals due to contact with its sap. People who are sensitive to plant sap should wear gloves when handling it. It does not produce airborne pollen that typically causes allergies.
Common problems
Common problems include leaf yellowing from overwatering, pest infestations like aphids or spider mites, and poor flowering if light is insufficient.
Uses
Primarily grown as an ornamental shrub for its striking flowers and attractive foliage in gardens and landscapes.
Notes
Prune after flowering to maintain shape and encourage bushier growth. Repot young plants annually to refresh soil. Protect from frost and cold drafts as it is sensitive to temperatures below 10°C (50°F).