How to Grow Clerodendrum
Clerodendrum
Clerodendrum spp.
shrubClerodendrum is a diverse genus of tropical and subtropical shrubs and vines known for their striking, fragrant flowers that often feature contrasting colors. Many species produce showy blooms in red, white, pink, or purple, often with prominent stamens that create a distinctive appearance. These plants are prized as ornamentals for their visual appeal and pleasant fragrance.
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Example Clerodendrum timeline · Pittsburgh, PA (Zone 6b)
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Plant Clerodendrum
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 Clerodendrum
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in USDA zones 10-11; can be grown in zone 9b with winter protection
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Establishment
4-8 weeksYoung plant focuses on root development with modest foliar growth
Keep soil consistently moist, provide bright indirect light, shelter from strong winds, avoid fertilizing for first 4-6 weeks
Vegetative Growth
6-12 monthsPlant develops branching structure and lush foliage; leaves are typically glossy and ovate
Fertilize monthly with balanced or high-nitrogen formula, prune to encourage bushiness, maintain humidity above 50%, monitor for scale insects
Flowering
2-4 months (peak season)Plant produces terminal flower clusters with showy tubular or star-shaped blooms, often fragrant
Reduce nitrogen, increase phosphorus and potassium to promote blooming, deadhead spent flowers to encourage more blooms, maintain consistent moisture
Fruiting/Post-Bloom
2-3 monthsAfter flowering, some species develop decorative berries; growth may slow in cooler months
Allow some flowers to remain if fruiting is desired, reduce watering slightly, light pruning to maintain shape, prepare for dormancy if in cooler zone
Winter Rest
3-4 monthsPlant growth slows significantly; leaves may yellow and drop in cooler climates
Reduce watering substantially, stop fertilizing, provide protection from frost (zone 9b), maintain temperatures above 50°F if possible, increase light exposure
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with horticultural oil or neem oil monthly; manually remove with soft brush; improve air circulation
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Isolate affected plant, spray with insecticidal soap or neem oil every 7-10 days, dab with rubbing alcohol on cotton swab
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Increase humidity and mist foliage, spray with water to dislodge, use neem oil or miticide if severe
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Yellow sticky traps, spray neem oil or insecticidal soap weekly, improve air circulation
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Spray with strong water stream, apply insecticidal soap or neem oil, encourage beneficial insects
Uses
Tropical Garden Ornament
OrnamentalClerodendrum is prized as a specimen shrub in tropical and subtropical gardens for its dramatic, fragrant flowers that bloom over extended seasons. The foliage is equally attractive, with glossy leaves providing year-round interest. [source]
Traditional Herbal Medicine
MedicinalVarious Clerodendrum species have been used in traditional Asian and African medicine to treat inflammation, fever, and respiratory ailments. Compounds in the plant have been studied for anti-inflammatory and antimalarial properties. [source]
Fragrant Cut Flowers
HouseholdThe fragrant flower clusters make excellent long-lasting cut flowers for indoor arrangements and bouquets. The blooms release a sweet, distinctive fragrance that varies by species. [source]
Pollinator Attraction
WildlifeClerodendrum flowers attract butterflies, hummingbirds, and other pollinators, making it valuable in gardens designed to support beneficial insects. The berries also provide food for birds. [source]
Dried Flower Crafts
CraftThe distinctive dried flower clusters and seed pods can be used in dried flower arrangements, wreaths, and pressed flower crafts, retaining their shape and providing texture. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Clerodendrum is grown ornamentally; harvest flowers when fully open for fresh arrangements or fragrance. Blooms are best in early morning. Cut stems just above leaf nodes to encourage branching. Flowers typically last 1-2 weeks in water. For some species, allow berries to develop for ornamental interest.
Fun Facts
- 🌱 The name 'Clerodendrum' comes from Greek words meaning 'chance' and 'tree,' referring to the random distribution of flower colors in some species.
- 🌱 Clerodendrum thomsoniae, known as Bleeding Heart Flower, has distinctive red flowers enclosed in white calyces that resemble a bleeding heart—it's a showstopper in tropical conservatories.
- 🌱 Some Clerodendrum species have an unusual trait: their flower buds are highly fragrant and attractive, drawing pollinators even before the blooms fully open.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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