20 - 30cm Alocasia Infernalis Black Magic House Plant 10.5 cm Pot

Alocasia infernalis ‘Black Magic’ is an exceptionally rare and exotic tropical plant from the rainforests of Borneo, belonging to the Araceae family. It is one of the most striking Jewel Alocasia varieties, admired for its dark, metallic foliage and otherworldly beauty.

The plant produces broad, heart-shaped leaves with an extraordinary deep burgundy to almost jet-black sheen that changes with the light. The surface of the leaves is highly reflective and velvety, giving it a metallic, mirror-like appearance — almost as though they’ve been dipped in liquid obsidian. The undersides contrast beautifully in rich maroon or red tones.

Compact yet bold, Alocasia ‘Black Magic’ makes a stunning statement piece for collectors of rare and unusual tropical plants. Its dark, moody tones bring an elegant and dramatic flair to terrariums, greenhouses, or humid indoor environments.

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Alocasia infernalis ‘Black Magic’ – Care Guide

Light

Prefers bright, indirect light. Too much direct sunlight can scorch the dark leaves, while too little light will cause the plant to lose its lustre and slow its growth. East- or north-facing windows are ideal.

Watering

Keep the soil evenly moist but never soggy. Water when the top 2–3 cm feels slightly dry. Consistency is key — avoid letting the plant dry out completely, but ensure good drainage to prevent root rot. Reduce watering slightly in winter.

Temperature and Humidity

• Temperature: Thrives in warmth, 22–28°C. Avoid temperatures below 18°C.

• Humidity: Requires high humidity (70–90%) to maintain its velvety texture and deep colour. Mist frequently, use a humidifier, or grow inside a terrarium or cabinet for best results.

Soil and Potting

Use a chunky, well-draining aroid mix – peat-free compost combined with orchid bark, perlite, and coco coir. This provides airflow and moisture retention without waterlogging. Repot every 1–2 years in spring to refresh the soil.

Feeding

Feed every 4–6 weeks during spring and summer with a diluted balanced liquid fertiliser. Avoid over-fertilising, as this can damage the delicate roots.

Pruning and Maintenance

Remove any yellowing or damaged leaves from the base. Wipe leaves gently with a soft, damp cloth to maintain their metallic sheen. Avoid leaf polish products, as they can dull or damage the surface.

Growth and Maturity

A compact, slow-growing plant that typically reaches 30–50 cm tall. With consistent warmth and humidity, ‘Black Magic’ produces new leaves regularly, each darker and more iridescent than the last.

Common Issues

• Yellowing leaves: Overwatering or low temperatures.

• Brown edges: Low humidity or inconsistent watering.

• Pale leaves: Insufficient light.

• Dormancy: Common during cooler months — reduce watering and resume once new growth appears.

• Pests: Occasionally spider mites, thrips, or mealybugs.

Background and Benefits

Native to the humid forests of Borneo, Alocasia infernalis (meaning “of the underworld”) earns its name from the mysterious, near-black hue of its leaves. The ‘Black Magic’ cultivar is one of the darkest in the genus, captivating collectors with its rare, almost supernatural appearance.

While it requires a little extra care and attention — particularly in humidity — the reward is one of the most breathtaking foliage plants available, perfect for those looking to expand their rare tropical collection.

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✅ Quick Care Summary

• Light: Bright, indirect; avoid direct sun

• Water: Keep evenly moist; allow topsoil to dry slightly

• Temperature: 22–28°C; avoid below 18°C

• Humidity: Very high (70–90%)

• Soil: Chunky, free-draining aroid mix

• Feed: Every 4–6 weeks in spring/summer

• Growth: Compact plant, 30–50 cm; deep black, glossy leaves with maroon undersides

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⚠️ Toxicity Note: Like all Alocasias, ‘Black Magic’ is toxic if ingested. Keep out of reach of pets and children.

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🌿 Styling Tip:
Pair Alocasia ‘Black Magic’ with light or variegated tropicals such as Philodendron ‘Brasil’ or Anthurium ‘Crystal Hope’ to highlight its dark, metallic foliage. It looks particularly striking in minimalist pots that contrast with its mysterious leaves.