Monstera adansonii ‘Monkey Mask’ is a tropical climbing aroid grown for its distinctive perforated leaves and adaptable growth habit indoors. This cultivar of Monstera adansonii produces oval to heart-shaped leaves with natural holes (fenestrations) that develop as the leaf matures. New leaves emerge light green and deepen to a richer green as they harden off. When supported with a moss pole or trellis, it will climb; without support, it trails, making it suitable for shelves or hanging positions.

In indoor conditions in the UK, Monstera adansonii ‘Monkey Mask’ typically develops stems up to 1–2 m long over time, with leaves commonly reaching 15–25 cm in length when mature. As a hemiepiphytic species in nature, it begins life on the forest floor and climbs trees using aerial roots. Replicating this with vertical support indoors encourages larger leaves and more pronounced fenestrations.

Native to:
Tropical Central and South America, including southern Mexico, Panama, and parts of the Amazon basin in Brazil and Peru. It grows in warm, humid rainforests where it climbs tree trunks under a canopy, receiving bright but filtered light. Leaves are thin but leathery, with elongated oval perforations that do not typically split to the margins (unlike Monstera deliciosa).

Water:
Water thoroughly when the top 1/3 of the potting mix has dried. The compost should remain slightly moist but never waterlogged. Reduce watering frequency in winter when growth slows. Ensure the pot has drainage holes and use a well-aerated aroid mix containing bark, perlite, and peat-free compost to prevent root rot.

Light:
Bright filtered light is ideal. It tolerates medium light levels, but growth may slow and fenestrations may be less pronounced. Avoid prolonged direct sun, especially strong midday sun, as this can scorch the leaves. A position near an east- or west-facing window with light diffusion works well.

Humidity:
Prefers moderate to high humidity, ideally 60–80%. It will tolerate average UK household humidity but grows more vigorously above 60%. When humidity is consistently above 70%, young plants also perform well in large terrariums or enclosed growing cabinets. Ensure some air movement to reduce the risk of fungal issues.

Temperature:
Best kept between 18–27°C. Avoid temperatures below 15°C, as prolonged cool conditions can slow growth and cause leaf yellowing. Keep away from cold draughts and sudden temperature fluctuations.