Wood Rose (Merremia tuberosa)

Wood Rose

Merremia tuberosa

Vibrant golden trumpets climb sunlit trellises, a cascade of tropical warmth. Fast-growing flowering vine; common names: Wood Rose, Spanish Arborvine.

Full sun
1/week
Moderate
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Plant Needs

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Sunlight Requires 6–8 hours of direct sunlight daily for abundant flowering; tolerates partial shade in extremely hot climates to prevent leaf scorch
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Watering Water deeply when the top 2–3 cm of soil feels dry; avoid overwatering to prevent root rot, especially in poorly drained soils
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Temperature Thrives in warm temperatures between 18–30°C; cannot tolerate frost, so bring indoors or protect in temperatures below 10°C
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Characteristics

  • Leaf: Heart-shaped, glossy green foliage, 5–15 cm long with pointed tips and smooth margins
  • Flower: Trumpet-shaped bright golden-yellow blooms, 7–10 cm wide, emitting a subtle evening fragrance
  • Stem: Slender, twining woody stems that wrap tightly around supports for climbing
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Care Guide

Watering

Keep soil consistently moist but not waterlogged; increase frequency during prolonged hot, dry spells

Fertilization

Apply a balanced, diluted liquid fertilizer every 2 weeks to support flowering. Avoid over-fertilization, as this can lead to excessive foliage growth at the expense of blooms

Banana Peel Tea:Chop 2–3 ripe banana peels and soak in 1 gallon of water for 3 days; strain out solids and dilute the tea 1:2 with water before applying to the soil around the base of the plant
Pruning
  • Trim back overgrown or tangled stems in early spring to encourage bushier growth and better flowering
  • Deadhead spent blooms regularly to promote continuous flower production throughout the growing season
  • Remove any damaged, diseased, or yellowing foliage to improve air circulation and prevent pest infestations
  • Cut back stems to 30–60 cm in late autumn if growing in a region with cool winters to prepare for dormancy
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA does not list this plant as toxic to cats

Humans: Raw tubers contain mild alkaloid compounds; cooked tubers are sometimes consumed in limited tropical regions with minimal risk

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Garden Uses & Culture

Culture: Valued in tropical landscaping for its vibrant, long-lasting blooms and fast climbing habit

Usage: Ornamental vine for trellises, arbors, and fences; cooked tubers are occasionally consumed as a starchy food source in parts of Central and South America