Black Calla Lily (Arum palaestinum)

Black Calla Lily

Arum palaestinum

Its deep purple spathe wraps a golden spadix, a dramatic shade-loving beauty. Herbaceous perennial; common names: Black Calla Lily, Palestinian Arum.

Dappled shade or bright indirect light; avoid direct midday summer sun which can scorch the delicate foliage
1/week
Moderate
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Plant Needs

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Sunlight Dappled shade or bright indirect light; avoid direct midday summer sun which can scorch the delicate foliage
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Watering Water thoroughly when the top 2–3 cm of soil dries out; avoid waterlogging to prevent corm rot
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Temperature Thrives in cool to temperate conditions; tolerates light frost down to 5°C, but avoid prolonged temperatures above 28°C which trigger summer dormancy
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Characteristics

  • Leaf: Glossy, arrow-shaped basal leaves, 15–30 cm long, dark green with pale, prominent veins
  • Flower: Deep purple-black spathe enclosing a bright yellow spadix; emits a faint fetid scent to attract pollinators
  • Stem: Thick, fleshy basal stems that support both leaves and inflorescences
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Care Guide

Watering

Keep soil consistently moist but not waterlogged during active growth

Fertilization

Diluted balanced liquid feed once every 2 weeks during active growth. Use a low-nitrogen feed to promote healthy corm development rather than excessive leaf growth

Composted banana peel tea:Steep fully composted banana peels in water for 24 hours; dilute the tea 1:20 before applying as a root drench to avoid burning delicate corm roots
Pruning
  • Remove yellowing or damaged leaves promptly to maintain plant health and appearance
  • Cut back spent inflorescences after flowering to prevent unnecessary energy loss
  • Divide overcrowded corm clumps in autumn after foliage has died back to promote better growth the following spring
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed toxic; ingestion causes drooling, vomiting, oral pain, and potential difficulty breathing

Humans: Contains calcium oxalate crystals; ingestion causes oral irritation, swelling, and difficulty swallowing; contact may irritate skin

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Garden Uses & Culture

Culture: Symbolizes resilience in Eastern Mediterranean folk traditions; historically referenced in regional botanical texts

Usage: Ornamental shade garden plant; used for dramatic cut floral arrangements (handle with gloves to avoid skin irritation)