Bleeding Heart Vine (Clerodendrum thomsoniae): Crimson & White Tropical Climber Guide
Native to the humid, sun-dappled rainforest understories and riverbanks of tropical West Africa (extending from Cameroon to Senegal), Clerodendrum thomsoniae—commonly known as Bleeding Heart Vine, Glory-Bower, Bleeding Glory-Bower, or Bagflower—is one of the most distinctive evergreen climbing vines in indoor collections, conservatories, and frost-free patio gardens. Celebrated for its inflated, balloon-like pure white calyxes out of which drop rich crimson tubular petals, deep green veined foliage, and continuous bloom cycle, it serves as an elegant structural centerpiece on trellises and hanging baskets.
Belonging to the mint family (Lamiaceae; formerly placed in Verbenaceae), it is closely allied with Blue Butterfly Bush (Rotheca myricoides / Clerodendrum ugandense) and Harlequin Glory-Bower (Clerodendrum trichotomum).
Alternative Names: Bleeding Heart Vine, Glory-Bower, Bleeding Glory-Bower, Bagflower, Clerodendrum, Kızılay Çiçeği / Kanayan Kalpler Sarmaşığı (Turkish).
Introduction
Botanical Name: Clerodendrum thomsoniae (Lamiaceae / Mint Family) — closely related to Blue Butterfly Bush (Rotheca myricoides) and Clerodendrum bungei.
Native Habitat: Tropical West Africa (humid, partially shaded rainforest margins and coastal river basins).
Characteristics: A fast-to-moderate growing, twining evergreen or semi-evergreen woody climber reaching 2 to 4 meters in height when provided with vertical support (easily maintained at 1 to 1.5 meters in indoor pots). Features ovate-lanceolate, deep green leaves (8–15 cm long) with prominent, sunken veins. From early spring through mid-to-late autumn, axillary and terminal cymes yield dense clusters of 8 to 20 flowers composed of inflated, 5-angled white lantern-like calyxes enclosing rich crimson-red tubular corollas. As blooms fade, the white calyxes transition to a soft lavender-pink shade.
Pros & Cons
Pros
Unrivaled Bicolor Floral Contrast: The stark contrast between puffy white calyxes and vivid crimson inner petals creates exceptional ornamental value.
Outstanding Indoor & Conservatory Houseplant: Adapts effortlessly to indoor environments with bright indirect light, flowering reliably near sunlit windows.
Extended Flowering Season: Produces an uninterrupted succession of fresh flower clusters from early spring through late autumn.
Versatile Climbing or Cascading Habit: Easily trained onto hoops, trellises, or obelisks, or allowed to cascade gracefully from high plant stands and hanging baskets.
Cons
Complete Freeze Sensitivity: Sustains severe tissue damage below 0°C to -2°C (28°F–32°F); must be overwintered indoors in cold continental regions.
Bud & Leaf Drop in Dry Indoor Air: Drops flower buds and lower foliage when exposed to low indoor humidity or prolonged drought stress.
Requires High Light for Maximum Blooms: Stems become leggy and flower production halts if grown in heavily shaded indoor corners.
Field Performance & Care Profile
Light Requirement: Bright Indirect Light to Partial Shade (Requires strong, filtered light for maximum bloom production; protect from harsh midday sun, though morning or late afternoon sun is beneficial).
Cold Hardiness: Tender (USDA Zones 10a–11). Survives outdoors year-round only in frost-free tropical or subtropical zones; grown as an indoor houseplant or patio pot specimen elsewhere.
Heat & Drought Tolerance: High heat tolerance (ideal growth at 20°C–30°C / 68°F–86°F), Low drought tolerance. Demands consistent soil moisture and atmospheric humidity.
Soil Requirements: Rich, organic, loose, slightly acidic (pH 5.5 – 6.5), well-draining peat-perlite potting media or garden loam.
Root System: Shallow, fibrous, highly adaptable root network that responds well to repotting.
Height & Spread: Reaches 2 to 4 meters tall on climbing supports; stays 1 to 1.5 meters tall and 60 to 90 cm wide in containers.
Watering: Moderate to High. Keep root zones consistently moist during active growth and blooming; allow only the top 1–2 cm of soil to dry out between waterings. Reduce watering slightly in winter.
Regional Adaptation: Perennial outdoors in frost-free Mediterranean, coastal, and tropical gardens; grown as an indoor houseplant, conservatory vine, or seasonal patio plant in cooler climates.
Lifespan: Broadleaf evergreen woody perennial climber.
Flower Characteristics: Pure white balloon-like calyxes with protruding crimson tubular petals; calyxes age to pale lavender-pink.
Bloom Period: Early spring through late autumn.
Care Level: Easy to Moderate (when given adequate humidity and light).
Propagation Methods
Semi-Hardwood & Stem Cuttings (Easiest Method): Take 10–12 cm tip cuttings in late spring or mid-summer. Remove lower leaves and insert into a moist peat-perlite medium or standing water; roots establish within 2 to 3 weeks.
Root Offsets & Division: Separate rooted basal suckers or offsets from mature potted plants during early spring repotting.
Pro Care Tips & Secrets
Prune Hard in Late Winter for Heavy Blooming: Because flowers form on fresh current-season growth, prune vines back by one-third in late winter or early spring (February–March). This encourages vigorous basal branching and multiplies spring floral racemes.
Provide a Cool Winter Rest Period: Allow the plant a winter resting phase (November–February) by keeping it in a cooler room (13°C–16°C / 55°F–60°F) with reduced watering. A cool winter rest triggers significantly heavier bloom flushes in spring.
Maintain High Air Humidity: Mist foliage regularly or set potted containers on humidity trays filled with wet pebbles to prevent leaf margin scorching in heated winter rooms.
Provide Sturdy Trellis or Hoop Support: Insert a bamboo hoop or wire obelisk into the pot at planting time to guide twining stems into a dense, vertical display.
Tags: Vine | Clerodendrum thomsoniae | Bleeding Heart Vine | Frost Sensitive | Red Flowers | White Flowers | Houseplant | Easy Care
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