Alocasia Cuprea Care Guide
Alocasia cuprea, commonly called the mirror plant or red secret alocasia, is a compact alocasia species native to Borneo. Its leaves are unlike most other aroids: the upper surface is a deep metallic copper or reddish-bronze in strong light, shifting to dark green in lower light, with a deeply impressed venation pattern that creates a ribbed, almost embossed appearance. The underside is dark purple-maroon. It is smaller than most alocasia species, with leaves reaching 20 to 30 centimeters, making it suited to shelves and display cases where its metallic surface can be appreciated closely. It is one of the more demanding alocasias in cultivation.
Quick Reference
| Factor | Requirement |
|---|---|
| Light | Bright indirect light for copper coloring |
| Water | Allow top 2 cm to dry; do not allow to dry fully |
| Humidity | 70 percent or above strongly preferred |
| Temperature | 18 to 27 degrees Celsius, no fluctuations |
| Soil | Well-draining aroid mix with higher coir ratio |
| Fertilizer | Balanced liquid fertilizer monthly at half strength, growing season |
| Pot | Small container with drainage holes |
| Toxicity | Toxic to cats, dogs, and humans if ingested |
Light and Metallic Coloration
The copper and bronze coloration of alocasia cuprea’s leaves is directly tied to light exposure. In bright indirect light, the metallic surface reflects light distinctively and the copper tones are most vivid. In lower light, the leaves shift toward a darker, less metallic green and the characteristic coloring diminishes. Position in the brightest available indirect light, avoiding direct sun which causes the metallic surface to bleach.
Humidity
Alocasia cuprea requires high humidity: 70 percent or above is strongly preferred and 60 percent is the practical minimum below which leaf edge damage becomes significant. The compact size makes it suitable for a plant cabinet, terrarium, or enclosed glass case where humidity can be maintained at appropriate levels. This is one of the few indoor plants where a terrarium or cabinet setup is genuinely the most practical growing environment for achieving the conditions the plant requires.
Watering
Allow only the top two centimeters of mix to dry before watering. Alocasia cuprea prefers more consistent moisture than most aroids but cannot tolerate waterlogging. A mix with a slightly higher coir proportion than the standard aroid recipe maintains the moisture level this species prefers. The adjusted recipe is covered in the how to make an aroid potting mix guide.
Dormancy and Propagation
Like all alocasias, cuprea may go dormant in winter or in response to low light, dropping its leaves and persisting as a corm. Reduce watering during dormancy and resume when new growth appears. Propagation is by offset separation: wait for offsets to develop their own leaves before separating at repotting time. The full method is in the how to propagate aroids guide.