Willow-leaved Justicia (Justicia gendarussa)

Willow-leaved Justicia

Justicia gendarussa

Its willow-like foliage adds soft texture to gardens. Upright flowering shrub; common name: White Justicia.

Partial sun
2/week
Beginner
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Plant Needs

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Sunlight Bright indirect light; tolerates partial shade, avoid harsh midday summer sun to prevent leaf scorch
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Watering Water thoroughly when the top 2–3 cm of soil dries out; avoid overwatering to prevent root rot
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Temperature Thrives in warm tropical to subtropical temperatures; protect from frost below 10°C to avoid leaf damage
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Characteristics

  • Leaf: Narrow lanceolate willow-like leaves, glossy green, arranged oppositely on stems
  • Flower: Small white or pale lavender tubular flowers in dense terminal spikes
  • Stem: Woody branching upright stems with smooth green young bark
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Care Guide

Watering

Keep soil consistently moist but not waterlogged

Fertilization

Diluted balanced liquid feed every 2 weeks. Avoid over-fertilizing to prevent leaf burn

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench; discard solid peels to avoid pest infestations
Pruning
  • Remove spent flower spikes to promote continuous blooming
  • Thin overcrowded branches to improve airflow and reduce disease risk
  • Trim leggy growth in early spring to maintain a compact, rounded shape
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No known toxicity to cats

Humans: No known toxic effects to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental hedge or container plant; traditional medicinal uses in some Southeast Asian regions