Polyscias filicifolia

The Pacific background of Polyscias filicifolia

Polyscias filicifolia comes from New Guinea and New Caledonia and is associated with wet tropical habitats, where it grows as a shrub or small tree.

It has also been grown around the south-west Pacific for generations and is now a familiar ornamental in other parts of the region.

Indoor care for Polyscias filicifolia

• Moisture and humidity: water when the upper mix has dried and the pot feels lighter, before the root ball becomes completely dry. Water thoroughly, then let the pot drain completely. Moderate to high humidity can help in rooms with dry heated air.
• Temperature: keep the temperature fairly steady at around 18–27 °C. Place the plant away from cold draughts and direct heater airflow.
• Light: bright indirect light helps maintain a leafy crown. Once adjusted, it can take gentle morning or late-afternoon sun. In a dim room, move it closer to a bright window with filtered light.
• Potting mix and repotting: choose an organic-rich mix that drains freely and retains some moisture between waterings. Repot once roots occupy most of the container or the plant starts using water much faster than before.
• Shaping and propagation: long stems can be shortened above a leaf joint to encourage branching. Healthy stem cuttings can also be rooted in warm, humid conditions.
• Feeding: use a complete fertiliser while new shoots are growing, at the dilution recommended on the label. When growth pauses, wait for new shoots before feeding again.

Troubleshooting Polyscias filicifolia

• Fine leaflet tips dry and turn crisp: the root ball has dried too far, heated air is very dry, or fertiliser salts have accumulated. Resume regular watering, move the plant away from direct heat and flush the mix with plain water if salt build-up is likely.
• Pale speckling spreads across the fine foliage: spider mites are likely, especially if fine webbing is present. Isolate the plant, rinse accessible foliage and choose a product labelled for spider mites. If another application is needed, wait for the interval specified on the label.
• Many leaflets fall within a short period: a cold draught, relocation or abrupt watering change can cause sudden leaf loss. Keep the plant warm in one bright position with filtered light and continue checking the mix before watering.
• The pot remains heavy and leaves begin to yellow: the mix is holding moisture for too long. Let it dry further and improve drainage. If the roots are dark and soft, remove the affected tissue back to firm healthy roots with a clean tool, discard the rot and repot in fresh mix.
• Cottony material or firm brown bumps collect on the stems: these are typical signs of mealybugs or scale insects. Isolate the plant, remove visible insects and treat with a product labelled for the pest present. If another treatment is needed, use the interval given on the label.

Polyscias filicifolia is toxic to cats and dogs

• Keep this plant away from cats and dogs that may chew it.
• It contains saponins that can irritate the mouth and digestive tract.
• Chewing may cause drooling, vomiting, stomach pain, reduced appetite or weakness. Contact a veterinarian if symptoms develop.

Polyscias filicifolia: name and meaning

Polyscias combines Greek polys, many, with skia, shade, parasol or canopy. Filicifolia comes from Latin filix, fern, and folium, leaf, and means fern-leaved.

Johann Reinhold Forster and Johann Georg Adam Forster established the genus Polyscias in 1776 in Characteres Generum Plantarum, second edition, page 63.

Eugène Pierre Nicolas Fournier first described it as Aralia filicifolia in 1876 in L’Illustration Horticole, volume 23, page 72; Charles Moore had proposed that name. Liberty Hyde Bailey later placed it in Polyscias as Polyscias filicifolia in 1916 in Rhodora, volume 18, page 153.