Physic Nut (Jatropha curcas)

Physic Nut

Jatropha curcas

Its bold foliage carries sharp contrast between green leaves and red stems. Evergreen shrub or small tree; common names: Physic Nut, Barbados Nut.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; thrives in intense sunlight in tropical regions, but can tolerate filtered light in extreme heat
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Watering Allow the top 2–3 cm of soil to dry completely between waterings; avoid waterlogging to prevent root rot
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Temperature Thrives in warm tropical and subtropical temperatures; frost below 10°C will cause leaf drop and stem damage
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Characteristics

  • Leaf: Glossy green, palmately lobed with 3–5 pointed lobes, 10–15 cm wide
  • Flower: Small, yellow-green to pale pink clusters; male and female flowers on same inflorescence
  • Stem: Slender, reddish-brown, with milky sap when damaged
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Care Guide

Watering

Keep soil consistently moist but not saturated; increase watering frequency during prolonged dry spells

Fertilization

Apply diluted balanced liquid fertilizer every 2 weeks. Avoid over-fertilizing, as excessive nutrients can reduce flowering and cause leaf burn

Banana peel compost tea:Compost banana peels for 4–6 weeks to break down nutrients; dilute the tea 1:20 with water before applying as a root drench to support flowering and fruit development
Pruning
  • Remove dead, diseased, or crossing branches in early spring to promote new growth and improve airflow
  • Thin overcrowded stems to increase light penetration and reduce the risk of fungal diseases
  • Trim to maintain a compact, rounded shape; avoid heavy pruning as it may delay flowering for the following season
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to phorbol esters; ingestion leads to vomiting, diarrhea, abdominal pain, and potential liver or kidney damage

Humans: Ingestion causes oral irritation, nausea, vomiting, and diarrhea; milky sap irritates skin and eyes

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental landscaping; seeds produce oil used in biodiesel production and traditional medicine (with caution due to toxicity)