Calloused Philodendron (Philodendron callosum)

Calloused Philodendron

Philodendron callosum

Thick, textured leaves bring rugged tropical charm to indoor spaces. Evergreen epiphytic foliage plant; common name: Calloused Philodendron.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Bright indirect light; avoid direct midday sun which can scorch thick leaves; tolerates low light for short periods
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Watering Allow the top 2–3 cm of soil to dry completely between waterings; avoid standing water to prevent root rot
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Temperature Thrives in 18–27℃; protect from temperatures below 12℃ to prevent leaf yellowing and damage
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Characteristics

  • Leaf: Thick, leathery, heart-shaped leaves with calloused margins; deep green with subtle venation
  • Stem: Slender, vining stems with aerial roots for anchorage
  • Inflorescence: Spadix with green spathe (rare in indoor cultivation)
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Care Guide

Watering

Keep soil evenly moist but not waterlogged

Fertilization

Diluted balanced liquid feed every 4 weeks. Avoid over-fertilizing to prevent leaf tip burn; stop feeding in autumn and winter

Banana peel tea:Soak 1 chopped banana peel in 1 liter of water for 24 hours; dilute 1:20 for root drench; discard solids to avoid odor and pest issues
Pruning
  • Trim yellowing or damaged leaves at the base to improve airflow and appearance
  • Train vining stems to a moss pole or trellis to encourage upright growth and larger leaves
  • Prune overgrown stems in early spring to promote bushier new growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion leads to oral pain, drooling, vomiting, and difficulty swallowing

Humans: Contains calcium oxalate crystals; ingestion causes oral irritation and discomfort; contact may trigger mild skin itch

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental indoor foliage; trailing or climbing houseplant for shelves or hanging planters