Clerodendrum thomsoniae is a woody, twining vine that can climb or trail depending on support. In the wild, it can reach several meters in length. Its leaves are opposite, glossy, and ovate with a pointed tip, typically 3–6 inches long. The plant produces pendulous clusters of flowers: each bloom has a papery white calyx from which emerges a tubular, bright red corolla. Flowering often occurs in warm months, especially when the plant receives ample light and humidity.

Light & Placement

For best growth and flowering, place the Bleeding Heart Vine in bright, indirect light. It can tolerate some direct morning sunlight, which may enhance blooming, but avoid intense afternoon sun that can scorch foliage. Indoors, an east- or west-facing window with filtered light is ideal. Outdoors, provide dappled shade or a location with gentle morning sun.

Watering & Humidity

Water thoroughly when the top 1–2 inches of soil feel dry. Ensure excess water drains freely to prevent root rot. Reduce watering during the plant’s semi-dormant period in winter, allowing the soil to dry slightly more between waterings.

This species prefers high humidity (50–70%). In dry indoor climates, increase humidity by:

• Using a room humidifier
• Placing the pot on a pebble tray with water (without submerging the pot base)
• Misting leaves in the morning to allow them to dry before evening

Soil & Repotting

Use a well-draining potting mix with a slightly acidic to neutral pH. A blend of peat moss, perlite, and compost works well. Repot every 1–2 years in spring, or when roots outgrow the container. Choose a pot with drainage holes to avoid waterlogging.

Fertilizing

Feed every 4–6 weeks during the active growing season (spring through early fall) with a balanced, water-soluble fertilizer diluted to half strength. Avoid over-fertilizing, which can lead to excessive leafy growth at the expense of flowers. Suspend feeding in winter.

Pruning & Training

Prune after flowering to maintain shape and encourage branching. Remove dead or weak stems to improve airflow. Clerodendrum thomsoniae responds well to training:

• Trellis: Guide stems along a trellis for vertical growth.
• Moss pole: Secure stems to a moss pole to encourage upright climbing.
• Hanging basket: Allow stems to trail for a cascading display.

Propagation (Step-by-Step)

1. In spring or early summer, select a healthy, non-flowering stem.
2. Cut a 4–6 inch section just below a node.
3. Remove the lower leaves, leaving 2–3 at the tip.
4. Optional: Dip the cut end in rooting hormone.
5. Place the cutting in water or in a small pot with moist, well-draining soil.
6. Maintain high humidity and bright, indirect light.
7. Roots typically develop in 3–6 weeks; transplant when well-established.

Common Problems

Pests

• Aphids: Small green or black insects on new growth; treat with insecticidal soap or neem oil.
• Spider mites: Fine webbing and stippled leaves; increase humidity and apply miticide if needed.
• Whiteflies: Tiny white insects that fly when disturbed; use yellow sticky traps and horticultural oil sprays.

Diseases

• Root rot: Caused by overwatering; prevent by using well-draining soil and pots with drainage holes.
• Leaf spot: Brown or black spots on leaves; remove affected foliage and avoid overhead watering.

Toxicity & Pet Safety

Clerodendrum thomsoniae is considered toxic if ingested. Keep it out of reach of pets and children, and wear gloves when pruning if you have sensitive skin.

Styling & Decor Tips

Showcase the Bleeding Heart Vine where its trailing or climbing habit can be appreciated. Indoors, train it on a decorative trellis in a bright sunroom or let it cascade from a hanging basket. Outdoors in warm climates, it can be used to cover arbors, pergolas, or fences, adding a tropical flair and seasonal bursts of color.

Varieties & Cultivars

While the classic form is most common, some cultivars may have slightly different flower sizes or leaf variegation. Availability varies by region and nursery stock.

Buying Tips & Maturity

When purchasing, look for plants with healthy, pest-free foliage and no signs of wilting or yellowing. Flowering specimens can be appealing, but non-blooming plants may establish more quickly after transplanting. Mature plants, when given proper care, can bloom multiple times per year in suitable climates.

Seasonal Care

• Spring: Resume regular feeding and watering; prune to shape and encourage new growth.
• Summer: Maintain high humidity and consistent moisture; provide support for climbing stems.
• Autumn: Reduce feeding; monitor for pests as indoor heating begins.
• Winter: Water sparingly; keep in bright light and protect from cold drafts.

FAQ

• How often does Bleeding Heart Vine bloom? In warm, bright conditions, it can bloom several times a year, especially in spring and summer.
• Can I grow Clerodendrum thomsoniae outdoors year-round? Only in frost-free climates; elsewhere, grow in containers and bring indoors during cold months.
• Why are my plant’s leaves yellowing? Possible causes include overwatering, poor drainage, or insufficient light.
• Does it need a support structure? Yes, if you want it to climb; otherwise, it can trail naturally from a hanging container.
• Is it safe for cats and dogs? No, it is toxic if ingested; keep away from pets.

For more information, see the Clerodendrum thomsoniae entry on Wikipedia.

Troubleshooting Scenarios

• No blooms despite healthy foliage: Often due to insufficient light or excessive nitrogen; move to a brighter spot and switch to a bloom-boosting fertilizer.
• Wilting even with moist soil: Could indicate root damage from rot or pests; inspect roots and repot in fresh, well-draining mix.
• Leggy growth with sparse leaves: Caused by low light; prune back and increase exposure to bright, indirect light.
• Sudden leaf drop: May occur from abrupt temperature changes or drafts; stabilize environment and avoid moving plant suddenly.

Advanced Pruning & Training Techniques

For a fuller, more floriferous vine, pinch back growing tips regularly during the active season to stimulate lateral shoots. Consider espalier training against a decorative frame for a living wall effect. In greenhouse settings, layering stems into adjacent pots can create multi-tiered displays. For bonsai-style experimentation, select a single stem and prune to maintain a woody trunk, encouraging a miniature tree form with seasonal blooms.

Companion Plant Suggestions

Pair Bleeding Heart Vine with plants that share similar humidity and light needs to create lush groupings:

• Jasminum sambac (Arabian Jasmine) for complementary fragrance
• Passiflora caerulea (Blue Passionflower) for contrasting flower shapes
• Asparagus densiflorus (Asparagus Fern) for feathery texture beneath climbing stems
• Hibiscus rosa-sinensis (Tropical Hibiscus) for bold, large blooms alongside the vine’s delicate clusters

Do & Don't List

• Do: Rotate the plant periodically indoors for even growth.
• Do: Quarantine new plants before placing near established specimens to prevent pest spread.
• Don't: Allow the plant to sit in waterlogged soil.
• Don't: Place in full, harsh midday sun without acclimation.