Neem Tree (Azadirachta indica)

Neem Tree

Azadirachta indica

Its leaves carry bitter healing power, a tropical guardian against pests. Evergreen medicinal tree; common names: neem, Indian lilac.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Requires full, direct sunlight for optimal growth and fruiting; tolerates partial shade but will produce fewer leaves and flowers
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Watering Water deeply and infrequently, allowing the top 15–20 cm of soil to dry completely between watering sessions; mature trees are highly drought-tolerant
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Temperature Thrives in warm tropical and subtropical climates; cannot tolerate frost or temperatures below 10°C, which will cause leaf drop and dieback
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Characteristics

  • Leaf: Compound pinnate leaves, 20–40 cm long; lanceolate leaflets with serrated margins, glossy green
  • Flower: Small, fragrant white panicles clustered at branch tips
  • Stem/Bark: Grayish-brown, fissured bark with bitter, resinous sap
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Care Guide

Watering

Keep soil consistently moist during active growth; avoid waterlogging to prevent root rot

Fertilization

Apply balanced organic fertilizer once monthly to support new growth. Avoid high-nitrogen fertilizers, which prioritize leaf growth over flower and fruit production

Banana peel compost tea:Compost banana peels for 2–3 weeks to break down bitter compounds, steep in water for 24 hours, dilute 1:20 with water, and apply as a root drench to support foliage health
Pruning
  • Prune dead, damaged, or diseased branches in early spring before new growth emerges
  • Thin overcrowded inner branches to improve airflow and sunlight penetration throughout the canopy
  • Trim lower branches to create a clear trunk for shade tree form, if desired
  • Avoid heavy pruning during flowering season to preserve potential fruiting
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; contains azadirachtin, causing vomiting, diarrhea, lethargy, and potential tremors in severe cases

Humans: Ingestion of large quantities causes nausea and abdominal pain; diluted topical use is generally safe for skin and hair care

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Garden Uses & Culture

Culture: Symbolizes purification and protection in Hindu culture; used in traditional Ayurvedic medicine for over 4,000 years

Usage: Medicinal (antimicrobial, anti-inflammatory, insecticidal properties), ornamental shade tree, organic garden pest control