Clerodendrum thomsoniae
Clerodendrum thomsoniae
Clerodendrum thomsoniae, commonly known as the bleeding heart vine, is celebrated for its stunning red and white flowers. Native to tropical Africa, this plant adds vibrant color to any indoor or outdoor space, making it a popular choice among gardeners.
Everything it needs
9 essentials at a glance
Watering
Clerodendrum thomsoniae prefers consistently moist soil, so water when the top inch of soil feels dry.
In warmer months, this may mean watering every 5-7 days, while in winter, reduce to every 10-14 days. Ensure the pot has drainage holes to prevent root rot. Signs of over-watering include yellowing leaves and a mushy stem, while under-watering may cause wilting and leaf drop.
Light
This plant thrives in bright, indirect light but can tolerate some direct sunlight.
Ideally, place it near a window that receives filtered light for at least 6 hours a day. Too little light may result in leggy growth, while too much direct sunlight can scorch the leaves.
Soil
Clerodendrum thomsoniae prefers a well-draining potting mix with a pH range of 6.0 to 7.0.
A mix of peat, perlite, and pine bark is ideal for good aeration and drainage. Ensure the pot has drainage holes to prevent waterlogging.
Humidity
This plant enjoys high humidity levels, ideally around 60-70%.
To increase humidity, consider using a pebble tray with water or a humidifier. Signs of low humidity stress include browning leaf tips and leaf drop.
Temperature
The ideal temperature range for Clerodendrum thomsoniae is between 65-80°F (18-27°C).
It is not frost-tolerant and should be kept in hardiness zones 10-12. Protect it from cold drafts and extreme heat, as temperatures below 50°F (10°C) can cause damage.
Fertilizing
Use a balanced liquid fertilizer with an NPK ratio of 10-10-10 every 4-6 weeks during the growing season (spring and summer).
Reduce or stop fertilizing in fall and winter. Signs of nutrient deficiency include yellowing leaves, poor growth, and lack of blooms.
Pruning
Prune Clerodendrum thomsoniae in late winter or early spring to encourage bushier growth and remove any dead or damaged stems.
Use sharp, clean pruning shears to make clean cuts. Deadheading spent flowers can promote further blooming.
Repotting
Repot every 1-2 years or when the plant becomes root-bound, which can be indicated by roots growing out of the drainage holes.
Choose a pot that is 1-2 inches larger in diameter. Carefully remove the plant from its pot, loosen any tightly bound roots, and place it in fresh potting mix.
Propagation
Clerodendrum thomsoniae can be propagated through stem cuttings or seeds.
For stem cuttings, take a 4-6 inch cutting from a healthy stem, remove the lower leaves, and place it in water or moist potting mix. Keep the cutting in a warm, humid environment until roots develop, usually within 2-4 weeks. Spring is the best time for propagation.
When it's unhappy
Yellow leaves
Why it happens
Over-watering or nutrient deficiency.
How to fix it
Check soil moisture and reduce watering frequency. Fertilize with a balanced fertilizer if nutrient deficiency is suspected.
Wilting leaves
Why it happens
Under-watering or low humidity.
How to fix it
Increase watering frequency and mist the leaves or use a humidifier to raise humidity levels.
Leaf drop
Why it happens
Sudden temperature changes or low humidity.
How to fix it
Maintain consistent temperatures and humidity levels, avoiding drafts and extreme heat.
Pest infestations (e.g., aphids, spider mites)
Why it happens
Weak plant health or dry conditions.
How to fix it
Inspect regularly, and treat with insecticidal soap or neem oil if pests are detected.
Leggy growth
Why it happens
Insufficient light.
How to fix it
Move the plant to a brighter location with indirect light to encourage bushier growth.
Care through the year
Spring
In spring, increase watering as the plant actively grows. Fertilize every 4-6 weeks and consider repotting if root-bound.
Summer
During summer, maintain consistent moisture and humidity. Prune spent flowers to encourage further blooming.
Fall
In fall, gradually reduce watering as the plant enters dormancy. Stop fertilizing and prepare for cooler temperatures.
Winter
In winter, keep the plant in a warm location away from drafts. Water less frequently and monitor for humidity levels.
Toxicity & Safety
Clerodendrum thomsoniae is considered mildly toxic to pets and humans. Ingestion of the leaves or flowers can cause gastrointestinal upset, including nausea and vomiting. Keep out of reach of children and pets.
Good to know
Why are my Clerodendrum thomsoniae leaves turning yellow?
Yellow leaves can indicate over-watering or a nutrient deficiency. Check the soil moisture and adjust your watering schedule accordingly.
How often should I water my Clerodendrum thomsoniae?
Water when the top inch of soil feels dry, typically every 5-7 days in summer and every 10-14 days in winter.
What light conditions are best for Clerodendrum thomsoniae?
This plant thrives in bright, indirect light for at least 6 hours a day. Too much direct sunlight can scorch the leaves.
How can I increase humidity for my Clerodendrum thomsoniae?
Increase humidity by using a pebble tray with water, misting the leaves regularly, or using a humidifier.
When is the best time to prune Clerodendrum thomsoniae?
Prune in late winter or early spring to encourage bushy growth and remove any dead or damaged stems.
How do I propagate Clerodendrum thomsoniae?
Propagate through stem cuttings taken in spring. Place cuttings in water or moist potting mix until roots develop.
Is Clerodendrum thomsoniae toxic to pets?
Yes, it is mildly toxic to pets and humans. Ingestion can cause gastrointestinal upset, so keep it out of reach.
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