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Pilea peperomioides
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Schefflera actinophylla · Araliaceae
Schefflera actinophylla, sold widely under the cultivar name 'Amate', is a large-leaved tropical tree native to Australia and New Guinea that has become a popular indoor specimen plant. In its natural habitat it can reach 15 metres or more, but as a houseplant it is typically kept to between 1.5 and 3 metres. The 'Amate' selection is particularly valued for its tolerance of lower light and indoor air conditions compared with standard Schefflera actinophylla.
Photo: J.M.Garg / CC BY-SA 3.0 via Wikimedia Commons
Schefflera 'Amate' performs best in bright, indirect light but will adapt to moderate indoor light, which is one of the traits that distinguishes it from the straight species. Avoid prolonged direct summer sun through glass, which can scorch the large leaflets. A position a metre or two back from a south- or west-facing window is often ideal. In very low light growth slows considerably and the plant may lose lower leaves.
Allow the top 2-3 cm of compost to dry out between waterings before watering thoroughly until water drains freely from the pot. Empty saucers after 30 minutes to prevent root rot. Reduce watering frequency in autumn and winter when growth slows. Overwatering is the most common cause of decline; the plant tolerates a degree of drought far better than it tolerates waterlogged roots.
Use a well-draining, loam-based or peat-free multipurpose compost mixed with 20-30% perlite or coarse grit to improve aeration and drainage. Schefflera roots need good oxygen levels; compacted or heavy compost leads rapidly to root rot. A slightly acidic to neutral pH of 6.0-7.0 is suitable.
Feed with a balanced, water-soluble fertiliser (such as 20-20-20 NPK) diluted to half strength once a month during the active growing season from March to September. Do not feed in autumn and winter when the plant is resting. Over-feeding can cause salt build-up in the compost; flush the pot with plain water every few months to prevent this.
This species originates from tropical and subtropical Queensland and New Guinea, so it prefers temperatures between 15 and 30°C and should not be exposed to temperatures below 10°C or frost. It appreciates humidity above 50%; in centrally heated homes, grouping plants together, placing the pot on a pebble tray with water, or using a humidifier will help. Keep the plant away from cold draughts, radiators and air-conditioning vents.
Repot every 2-3 years in spring when roots begin to emerge from the drainage holes or the plant is visibly pot-bound. Move up only one pot size at a time, typically 5 cm larger in diameter, as excessively large pots retain moisture and increase the risk of root rot. Gently loosen the root ball, remove any dead or rotting roots, and use fresh compost. Mature specimens can be top-dressed annually instead of full repotting.
Prune in spring to control height and encourage a bushier habit. Cut stems back to just above a leaf node using clean, sharp secateurs. Wearing gloves is advisable as the sap can cause skin irritation in some people. Removing any dead, damaged or crossing stems at any time of year keeps the plant tidy and improves air circulation. The plant responds well to pruning and will produce new growth from cut stems.
Take a stem cutting of 10-15 cm with at least two leaf nodes in spring or early summer, remove the lower leaves, and insert into a mix of perlite and moist compost. Cover with a clear plastic bag or propagator lid to maintain humidity and place in a warm, bright spot (around 21-24°C); roots typically develop within 4-8 weeks.
Select a healthy stem, wound it by removing a ring of bark or making an upward diagonal cut, pack moist sphagnum moss around the wound, and wrap tightly in clear polythene film secured at both ends. Once roots are visible through the moss after several weeks, cut the stem below the rooted section and pot up.
Fresh seed can be sown on the surface of moist, well-draining seed compost at around 20-24°C; germination is erratic and may take several weeks. This method is rarely practical for home growers as fresh seed can be difficult to source and the 'Amate' cultivar characteristics are not reliably reproduced from seed.
Native to Queensland (Australia), Northern Territory (Australia), New Guinea (Papua New Guinea and Indonesia).
The genus name Schefflera honours Jacob Christian Scheffler (1698-1742), a German botanist and physician from Danzig. The species epithet actinophylla derives from the Greek words 'aktinos' (ray) and 'phyllon' (leaf), referring to the distinctive radiating arrangement of the leaflets around the tip of the leaf stalk, which resembles the spokes of a wheel or the rays of the sun.
Schefflera actinophylla was formally described by the German botanist Heinrich Gustav Adolf Engler in 1867, based on specimens collected from Queensland, Australia. It was introduced to horticulture in the late 19th and early 20th centuries and became popular as a large specimen plant for tropical landscaping in warm climates. Its adoption as an indoor plant accelerated during the latter half of the 20th century as demand grew for bold, easy-care foliage plants. The 'Amate' cultivar, introduced commercially in the 1980s and 1990s, significantly broadened its appeal by improving its performance under the lower light and humidity levels typical of homes and offices.
The most widely sold cultivar for indoor use; selected for improved tolerance of low light, low humidity and indoor conditions compared with the straight species
A variegated sport of 'Amate' with bright yellow-green marbling on the foliage; requires brighter light to maintain variegation
A closely related dwarf species sometimes sold alongside actinophylla; smaller in all parts and more suitable for smaller spaces