About Plumbago
A sprawling, semi-climbing shrub that produces abundant clusters of sky-blue, phlox-like flowers almost year-round in tropical climates. Its soft blue color is rare among tropical flowering plants, making it a prized addition to any garden. Plumbago can be trained as a hedge, a ground cover, a climber on fences, or a cascading container plant. Plumbago belongs to the Plumbaginaceae family and originates from South Africa; widely naturalized and cultivated in tropical and subtropical regions worldwide..
Blue Plumbago is increasingly popular in Philippine landscape design for its rare blue flower color, which provides a cool visual contrast to the reds, pinks, and yellows that dominate tropical gardens. It is commonly used as a flowering hedge in upscale subdivisions and resort gardens in Tagaytay, Batangas, and Cebu. Landscape architects value it for its versatility — it can serve as a hedge, a ground cover on slopes, or a fence-climbing scrambler. Available at most landscape nurseries and garden centers. Its blue flowers attract butterflies and make it a standout in any Filipino garden.
Also known as: Cape Leadwort, Sky Flower.
Popular Varieties
- Plumbago auriculata (classic sky blue — the most common)
- Plumbago auriculata 'Alba' (white-flowered variety)
- Plumbago auriculata 'Royal Cape' (deeper blue, more compact)
- Plumbago indica (Scarlet Plumbago — red flowers, a different species)
How to Plant Plumbago in the Philippines
Plumbago can be propagated through stem cuttings, seeds, root suckers. The recommended method is semi-hardwood stem cuttings.
Propagation Steps
- Step 1: Take 15-20 cm cuttings from healthy, non-flowering branches.
- Step 2: Remove lower leaves and any flower clusters.
- Step 3: Dip in rooting hormone and plant in moist potting mix.
- Step 4: Keep in bright indirect light and maintain moisture.
- Step 5: Roots develop in 3-4 weeks.
- Step 6: Transplant to the garden or a large container once well-rooted.
Care Guide
Sunlight
Full sun to partial shade (blooms most heavily in full sun, 6-8 hours). Position your plumbago where it receives the right amount of light for healthy growth in Philippine conditions.
Water
Water regularly during the dry season, 2-3 times per week. Drought-tolerant once established but flowers more with consistent moisture. Adjust frequency during the Philippine rainy season when humidity is higher and soil stays moist longer.
Temperature & Humidity
Ideal temperature range: 25-35°C (heat-tolerant, thrives in Philippine lowlands). Moderate to high — well-adapted to Philippine conditions The warm, humid Philippine climate is well-suited for growing plumbago outdoors or indoors.
Fertilizer
Balanced fertilizer (14-14-14) every 4-6 weeks. Supplement with bloom booster (10-30-20) during peak flowering months.
Pruning
Prune regularly to maintain shape and encourage dense flowering. Can be sheared into a formal hedge. Cut back hard in early rainy season for a vigorous flush of new growth and flowers.
Toxicity & Safety
Mildly toxic — sap may cause skin irritation (contact dermatitis) in sensitive individuals. Wear gloves when pruning. Keep away from pets.
Common Problems & Solutions
Sticky, glandular flower calyces clinging to clothes
Cause: Natural adaptation for seed dispersal — the calyx has sticky hairs
Solution: Plant away from walkways where brushing against it is unavoidable. This is a natural characteristic, not a defect.
Whiteflies on leaf undersides
Cause: Warm, sheltered conditions
Solution: Spray with neem oil or insecticidal soap. Use yellow sticky traps nearby.
Sparse flowering
Cause: Too much shade or excess nitrogen
Solution: Move to a sunnier position. Switch to phosphorus-rich fertilizer.
Scraggly, leggy growth
Cause: Lack of pruning
Solution: Prune regularly to maintain compact shape. Plumbago responds excellently to hard pruning.
Frequently Asked Questions
How do you care for Plumbago in the Philippines?
Plumbago needs full sun to partial shade (blooms most heavily in full sun, 6-8 hours). Water regularly during the dry season, 2-3 times per week. drought-tolerant once established but flowers more with consistent moisture.. Feed with balanced fertilizer (14-14-14) every 4-6 weeks. supplement with bloom booster (10-30-20) during peak flowering months.. The Philippine climate with temperatures of 25-35°C (heat-tolerant, thrives in Philippine lowlands) works well for this plant.
How do you propagate Plumbago?
The recommended method is semi-hardwood stem cuttings. Take 15-20 cm cuttings from healthy, non-flowering branches. Remove lower leaves and any flower clusters.
Is Plumbago toxic to pets or children?
Mildly toxic — sap may cause skin irritation (contact dermatitis) in sensitive individuals. Wear gloves when pruning. Keep away from pets.
Can Plumbago grow in containers in the Philippines?
Yes, Plumbago grows well in containers and is suitable for balcony and indoor gardening in Metro Manila condos and apartments. Use a pot with drainage holes and appropriate potting mix.
What are common problems when growing Plumbago?
Common issues include: Sticky, glandular flower calyces clinging to clothes (caused by natural adaptation for seed dispersal — the calyx has sticky hairs — plant away from walkways where brushing against it is unavoidable. this is a natural characteristic, not a defect); Whiteflies on leaf undersides (caused by warm, sheltered conditions — spray with neem oil or insecticidal soap. use yellow sticky traps nearby); Sparse flowering (caused by too much shade or excess nitrogen — move to a sunnier position. switch to phosphorus-rich fertilizer).
Growing plumbago in Manila? Tag us @urbangoesgreen on TikTok and show us your garden!