Quinine Tree (Rauvolfia caffra)

Quinine Tree

Rauvolfia caffra

Its glossy evergreen foliage holds medicinal alkaloids, a quiet giant of subtropical woodlands. Evergreen tree; common name: Cape Rauvolfia.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Thrives in full sun to partial shade; protect from harsh midday sun in hot, arid climates to prevent leaf scorch
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Watering Water deeply when the top 5 cm of soil is dry; avoid waterlogging to prevent root rot
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Temperature Hardy to mild frost; protect from temperatures below 5°C; optimal growth occurs at 15–28°C
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Characteristics

  • Leaf: Opposite, elliptical, glossy dark green leaves with smooth, entire margins
  • Flower: Clusters of small, fragrant white or pale pink tubular flowers
  • Stem/Bark: Grey-brown smooth bark on young trees; becomes fissured with maturity
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Care Guide

Watering

Keep soil consistently moist but not saturated; apply mulch to retain soil moisture

Fertilization

Apply balanced slow-release fertilizer once at the start of growing season. Avoid high-nitrogen fertilizers to prioritize flowering over excessive foliage growth

Composted banana peel tea:Soak fully composted banana peels in water for 3 days, dilute 1:20 for root drench; discard solid debris to prevent pest infestations and odor
Pruning
  • Remove dead, damaged, or crossing branches in late winter to improve airflow
  • Thin crowded inner branches to enhance light penetration to lower foliage
  • Shape young trees in early spring to establish a strong, upright canopy structure
  • Avoid heavy pruning after flowering to preserve next season's bloom potential
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: Alkaloid content may cause vomiting, lethargy, low blood pressure, tremors if ingested

Humans: Contains reserpine and other alkaloids; ingestion causes hypotension, drowsiness, nausea; sap may irritate skin

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Garden Uses & Culture

Culture: N/A

Usage: Medinal source of reserpine for hypertension treatment; ornamental shade tree