What aglaonema actually is
Aglaonema commutatum is the species most commonly sold, though most modern cultivars are complex hybrids between several Aglaonema species. The genus belongs to the aroid family (Araceae) and comes from the shaded understorey of tropical and subtropical rainforests across Southeast Asia and South China — from the Philippines and Indonesia through Thailand, Malaysia, and into southern China.
In the wild, aglaonema grows in deep forest shade, typically receiving less than 500 lux for most of the day. This ecological backstory explains its legendary low-light tolerance — and the waxy, thick leaves shared with other shade-tolerant aroids.
Like all aroids, it contains insoluble calcium oxalate raphides that cause oral irritation in pets and humans. It is in the same toxicity class as peace lily, philodendron, and ZZ plant — unpleasant if chewed, not typically life-threatening. See are houseplants toxic to cats and dogs for the full ranking.
Light — the colour rule
Aglaonema's light requirement varies with cultivar colour, and understanding this is the single most useful piece of information for keeping the plant well. The rule is simple: darker and greener cultivars tolerate lower light; brighter and redder cultivars need brighter light to hold their colour.
- ·Dark green / silver-streaked (e.g. 'Silver Queen', 'Silver Bay', 'Maria'): 200–800 lux. Genuine low-light candidates — a position 2–3 m from a north-facing window in a Nordic apartment is acceptable.
- ·Medium variegated green and white (e.g. 'Emerald Beauty', 'White Lancet'): 500–1,500 lux. Medium indirect. North or east window at 1–2 m.
- ·Pink and red (e.g. 'Red Siam', 'Siam Aurora', 'Creta'): 1,500–3,000 lux. Bright indirect light needed to hold colour. In lower light, pink or red pigmentation fades toward green within 2–3 months.
- ·Orange and bi-colour (e.g. 'Wishes', 'Tigress'): same as pink and red; needs bright indirect with no direct midday sun.
Avoiding the light extremes
Direct sun scorches aglaonema leaves rapidly — pale bleached patches appear within a single afternoon at a south window in summer and do not reverse. Even the brighter-coloured cultivars cannot handle sustained direct midday sun. An east window with direct morning light is usually fine; a south or west window needs a sheer curtain.
At the low-light end, aglaonema tolerates deeper shade than almost any other popular foliage plant. In light below 150 lux — an interior corridor or the corner of a large room — even the dark green varieties grow very slowly and may drop the occasional leaf, but they survive where peace lily and snake plant struggle. This is one of few plants where the marketing term 'shade-tolerant' is genuinely accurate. See low-light houseplants that actually survive for a ranked comparison.
Watering
Water aglaonema when the top 3–4 cm of soil is dry. In a medium-light position in summer, this means watering every 7–14 days. In winter or low light, every 2–3 weeks. The plant is forgiving of both slightly over- and under-watering, but sustained overwatering leads to root rot over several months.
Aglaonema is moderately sensitive to fluoride and chlorine in tap water — a trait shared with other aroids from soft-water tropical environments. If you notice brown leaf tips appearing around leaf edges, switch to filtered water or tap water left uncovered for 24 hours. See tap water for houseplants for the full breakdown.
Humidity and temperature
Aglaonema is comfortable at 50–60% relative humidity but tolerates 40% without significant problems. Unlike calathea or stromanthe, it does not develop brown leaf tips from ordinary heated-apartment winter air — making it a better choice than most tropical aroids for a Nordic apartment in winter.
Temperature should stay above 12 °C. Cold damage shows as dark, water-soaked patches on the leaves, particularly on plants sitting on cold windowsills. Keep the plant at least 10 cm back from single-glazed glass in winter and away from cold drafts. See indoor humidity for houseplants in winter for practical options.
Soil, repotting, and feeding
Aglaonema grows well in standard houseplant compost lightened with 20–30% perlite — a mix that holds some moisture but drains freely and does not stay wet for more than 7–10 days after watering.
Repot every 18–24 months, or when roots begin emerging from the drainage holes. Go one pot size up. Spring is the best repotting time; expect a 2–4 week adjustment period with slowed growth. See when to repot houseplants.
Feed monthly from April to September with a balanced liquid fertiliser at half strength. Skip fertiliser from October to March. In low light, feed even less — once every 6–8 weeks in summer, not at all in winter. An over-fertilised aglaonema shows brown leaf tips and a white salt crust on the soil surface.
Common problems
Aglaonema is one of the more problem-free houseplants, but a few issues come up regularly:
- ·Yellow leaves: Most commonly overwatering — lower leaves first, soil stays wet more than 10 days. Also from direct sun or cold shock. See why are my plant leaves turning yellow.
- ·Brown leaf tips: Fluoride/chlorine sensitivity, low humidity, or fertiliser salt buildup.
- ·Colour fading on pink/red cultivars: Insufficient light. Move closer to a bright window.
- ·Drooping leaves: Underwatering (soil very dry), cold damage, or root rot. Check the soil first.
- ·Root rot: Soggy soil sustained for weeks. Unpot, trim brown roots, repot in fresh mix. See root rot in houseplants.
- ·Pests: Spider mites in dry conditions; mealybugs in the leaf axils. Inspect monthly.
Propagation
Aglaonema propagates reliably from stem cuttings with 2–3 nodes and at least 2–3 leaves. Let the cut end callous for a day, then plant in slightly damp perlite or cactus mix. Roots form in 3–6 weeks at 20–25 °C in bright indirect light.
Division at repotting is the easiest method for an established multi-stemmed plant. Gently separate the root ball into sections, each with several healthy stems, and pot individually. Division plants recover faster than cuttings and look presentable within 4–8 weeks.
