About Polyscias
Polyscias is a genus of around 100 species of shrubs and small trees in the family Araliaceae, native to tropical Asia, the Pacific Islands, and parts of Africa. Several species are cultivated as houseplants, including Polyscias fruticosa (ming aralia), Polyscias scutellaria (shield aralia), and Polyscias balfouriana. They are valued for their intricate, finely cut foliage and their tendency to develop attractive, sculptural woody stems over time.
Light Requirements
Polyscias do best in bright, indirect light. A spot near a south or west-facing window, shaded from direct midday sun, is ideal. They can adapt to lower light but growth slows considerably and the plant becomes less robust. Insufficient light combined with cool temperatures is a common cause of leaf drop.
Watering
Allow the top 2-3 cm of compost to dry between waterings during the growing season. Polyscias dislike both overwatering and prolonged drought. In winter, reduce watering to match the slower growth rate. Always use room-temperature water and ensure the pot drains freely.
Humidity and Temperature
Warm, humid conditions are essential. Polyscias prefer temperatures of 18-27 degrees C and suffer in cold draughts or temperatures below 15 degrees C. Low humidity causes leaf drop and brown leaf tips. Mist regularly, use a pebble tray, or run a humidifier nearby for best results.
Feeding
Feed monthly during spring and summer with a balanced liquid fertiliser. Reduce to every 6-8 weeks in autumn and stop entirely in winter. Consistent feeding supports healthy leaf production and encourages the development of the plant's attractive woody structure.
Pruning and Shaping
Polyscias respond well to gentle pruning, which encourages branching and a fuller canopy. Prune in spring using clean, sharp scissors or secateurs. The plant can be shaped over many years into a bonsai-style specimen. Remove any dead or crossing branches to maintain the structure.
Common Problems
Leaf drop is the most common complaint and is almost always triggered by cold draughts, low humidity, overwatering, or moving the plant to a new position. Once settled, polyscias are stable. Spider mites and scale insects occasionally appear in low-humidity conditions and should be treated promptly with neem oil or a systemic insecticide.