False Ashoka Tree (Polyalthia longifolia)

False Ashoka Tree

Polyalthia longifolia

Its columnar form brings vertical elegance to urban landscapes. Evergreen ornamental tree; common names: false ashoka, Indian mast tree.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; highly tolerant of urban air pollution and heat
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Watering Water deeply when the top 15–20 cm of soil dries out; drought-tolerant once fully established
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Temperature Thrives in warm temperate to tropical climates; sensitive to frost damage below 10°C
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Characteristics

  • Leaf: Long, lanceolate, glossy green leaves with a characteristic drooping habit.
  • Flower: Small, pale greenish-yellow, fragrant flowers produced in axillary clusters.
  • Stem/Bark: Smooth, greyish-brown bark with dense, upright branching structure.
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Care Guide

Watering

Maintain consistently moist soil without waterlogging

Fertilization

Balanced diluted organic feed every 2 months. Avoid over-fertilizing to prevent excessive vegetative growth that weakens the columnar form

Banana Peel Compost Tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench to support flowering and foliage health
Pruning
  • Trim lower lateral branches in early spring to preserve the narrow columnar growth habit
  • Remove dead, diseased, or crossing branches to improve canopy airflow
  • Lightly shape the canopy to control height for urban planting applications
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: Valued for its formal, upright form in South Indian urban landscaping

Usage: Ornamental avenue tree, garden specimen, and noise barrier planting