Firespike (Odontonema callistachyum)

Firespike

Odontonema callistachyum

Tubular red blooms light up shade like flickering embers. Evergreen flowering shrub; common name: Firespike.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Prefers partial shade to filtered sunlight; tolerates full morning sun but scorches in intense midday sun
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Watering Water thoroughly when top 2–3 cm of soil dries; avoid waterlogging to prevent root rot
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Temperature Thrives in warm, humid conditions; protect from temperatures below 10°C to prevent leaf browning and dieback
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Characteristics

  • Leaf: Opposite, elliptical to lanceolate leaves; glossy dark green, 10–20 cm long
  • Flower: Dense terminal spikes of tubular bright red flowers, 2–3 cm long
  • Stem: Woody, branching stems with smooth green to brown bark
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Care Guide

Watering

Keep soil consistently moist but not soggy to support active growth and flowering

Fertilization

Diluted balanced liquid fertilizer every 2 weeks. Discontinue fertilization in autumn and winter when growth slows

Banana peel compost tea:Soak fully composted banana peels in water for 24 hours, dilute 1:20 for root drench; avoid raw peels to prevent pest infestations
Pruning
  • Deadhead spent flower spikes to encourage extended blooming periods
  • Prune back leggy stems by one-third in early spring to promote compact, bushy growth
  • Remove yellowing or damaged leaves to maintain plant health and improve airflow
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: Associated with attracting hummingbirds and butterflies, symbolizing lively, vibrant energy

Usage: Ornamental garden plant; used in border plantings and pollinator gardens