How to Grow Blue Plumbago
Blue Plumbago
Plumbago auriculata
shrubBlue Plumbago is a tropical to subtropical evergreen shrub prized for its stunning sky-blue flowers that bloom in terminal clusters throughout warm months. It grows as a sprawling shrub or vine, reaching 6-10 feet tall and wide, and serves as an excellent ornamental for borders, screens, and containers. The plant thrives in warm climates and attracts butterflies and other pollinators with its prolific blooming.
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Example Blue Plumbago timeline · Pittsburgh, PA (Zone 6b)
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Plant Blue Plumbago
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Blue Plumbago
Around Jul 16≈ 90 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9b-11; can be grown as a container plant in cooler zones and brought indoors in winter
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Get my Blue Plumbago timeline →Growth Stages
Establishment
4-6 weeksYoung transplant with initial shoot growth and root system development
Water regularly to establish roots. Avoid fertilizing for 4-6 weeks. Provide support structure if growing as a vine.
Vegetative Growth
6-8 weeksRapid branching and foliage expansion with glossy green leaves and no flowers
Apply balanced fertilizer monthly during growing season. Prune to shape as desired. Pinch back growing tips to encourage bushiness.
Flowering
3-6 months or until frostAbundant terminal clusters of sky-blue (sometimes white or pink cultivars) flowers appear; blooming continues for months
Fertilize every 2-3 weeks with low-nitrogen, higher-phosphorus formula to encourage blooms. Deadhead spent flowers to extend season.
Dormancy/Winter Rest
2-4 monthsGrowth slows; leaves may thin or drop in cool climates; minimal flowering
Reduce watering. Move container plants indoors before frost. Prune to maintain shape in early spring. Very light or no fertilizer.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with insecticidal soap or horticultural oil; encourage beneficial insects; isolate infested plants
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Increase humidity; spray with neem oil or miticide; prune heavily infested branches
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Remove with alcohol-soaked cotton swab; spray with insecticidal soap; improve air circulation
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Prune heavily infested branches; spray with dormant oil in winter; use horticultural oil
Uses
Not edible
CulinaryBlue Plumbago is ornamental only and is not suitable for consumption. [source]
Traditional herbal preparations
MedicinalIn traditional Indian and African medicine, Plumbago species have been used to treat various skin conditions, wounds, and inflammation, though scientific evidence is limited and the plant contains toxic compounds requiring careful handling. [source]
Fresh cut flowers and arrangements
HouseholdThe vibrant blue flower clusters are excellent for fresh flower arrangements, adding tropical color to indoor displays. Flowers last several days in water. [source]
Ornamental landscape and screening
HouseholdBlue Plumbago is widely used as a flowering hedge, privacy screen, or border plant in warm climates, providing colorful foliage and prolific blooms throughout the warm season. [source]
Pollinator attraction
WildlifeThe abundant flowers attract butterflies, bees, and hummingbirds, making it an excellent choice for pollinator gardens and wildlife landscapes. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Blue Plumbago is not harvested for food. For ornamental use, cut flower clusters for fresh arrangements by snipping just below the bloom cluster. Pinch back or prune stems regularly during growing season to encourage fuller, bushier growth and more flowering branches. Deadhead regularly to extend the blooming season.
Fun Facts
- 🌱 Blue Plumbago gets its common name from the blue pigment in its flowers; 'Plumbago' comes from the Latin word for lead, though the origin of this connection is debated—possibly referencing a mineral content or historical use
- 🌱 The plant can be trained as a small tree or standard form by selective pruning, or allowed to sprawl as a groundcover, making it highly versatile in garden design
- 🌱 Pink and white flowering varieties exist, offering color alternatives while maintaining the same growing requirements and care needs
Gardening Terms
New to gardening? Learn about terms used in this guide:
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