Aglaonema pictum tricolor

Horticultural Name and Geographic Background

Tricolor is a horticultural name for three-coloured forms of Aglaonema pictum from Sumatra, including Nias. Aglaonema tricolor is a separate species native to the Philippines.

Care for Aglaonema pictum tricolor

• Water and substrate: Keep the root zone lightly and consistently moist without saturation. Water after roughly the upper quarter to third of the substrate has dried, using a porous mix that combines moisture-holding material with coarse structure.
• Stable warmth is particularly useful for this form: around 20–28 °C is suitable, and prolonged temperatures below 15 °C are best avoided. Moderate to high humidity helps in dry rooms as long as the root zone remains well aerated.
• Light: Give the plant bright indirect light and protect the matte leaves from direct sun.
• Feeding: Feed at a low rate while new growth is active. Reduce or pause feeding when the plant is not producing new leaves.

Common problems with Aglaonema pictum tricolor

• Stalled growth: If new growth stalls, check usable light, root health and temperature before increasing water or fertiliser. Move a dim plant gradually into brighter filtered light or restore stable warmth after chilling. If roots are soft and dark, remove only the damaged tissue and repot the firm roots in fresh airy mix. Keep conditions steady while the leaves remain firm and the roots are healthy.
• Yellowing in wet mix: A continuously wet root ball can leave the roots short of air and lead to yellow foliage. Increase the drying time and make sure drainage is unobstructed. If yellowing keeps spreading, unpot the plant and assess the roots; cut away only tissue that is clearly soft and dark, then use a fresh airy mix when rot is present.
• Crispy edges: Crispy edges after a dry root ball or hot dry airflow point to a need for steadier moisture and humidity. If those conditions are already steady, flush the substrate to reduce possible fertiliser-salt build-up.
• Cold damage: Dark, translucent or water-soaked patches after chilling indicate cold injury. Return the plant to stable warmth and remove tissue only if it becomes soft or begins to decay.
• Hidden thrips or spider mites: The three-tone pattern can hide early pest feeding. Silvery scars with black specks indicate thrips, while fine pale stippling with webbing indicates spider mites; distorted emerging leaves alone do not confirm either pest. If you confirm thrips or spider mites, isolate the plant, inspect both leaf surfaces closely and rinse hardened foliage. Apply a treatment labelled for the confirmed pest to both leaf surfaces and the new growth, then repeat it at the intervals stated on the label for the full course.

Aglaonema pictum tricolor is toxic to people and pets

• Keep this plant away from children, cats and dogs.
• Its leaves and stems contain insoluble calcium oxalate crystals, which can irritate the mouth, throat, skin and eyes.
• Chewing may cause burning pain, drooling, swelling, vomiting or difficulty swallowing. Contact a veterinarian or medical professional after exposure, especially if swelling or breathing problems occur.

What does Aglaonema pictum mean, and who first published it?

Aglaonema combines Greek aglaos, meaning shining or splendid, with nema, meaning thread or filament. The epithet pictum is Latin for painted, referring to the patterned leaves.

Heinrich Wilhelm Schott established the genus Aglaonema in 1829 in Wiener Zeitschrift für Kunst, Literatur, Theater und Mode, volume 1829, page 892.

William Roxburgh first described it as Calla picta in 1832 in Flora Indica, 1832 edition, volume 3, page 516. Karl Sigismund Kunth later placed it in Aglaonema as Aglaonema pictum in 1841 in Enumeratio Plantarum, volume 3, page 55.