Aglaonema ‘Maria’

A long-established cultivar with an uncertain origin

Aglaonema ‘Maria’, also sold as ‘Emerald Beauty’, has circulated in the foliage trade for decades. A long-standing trade account traces it to Philippine material introduced by Tropical Ornamentals of Delray Beach, Florida, during the 1970s. Formal parentage records are absent, while genetic research indicates a relationship with Aglaonema commutatum.

Care for Aglaonema ‘Maria’

• Light: Medium to bright indirect light is suitable. Lower light slows growth and keeps the pot wet longer; strong sun through glass can scorch the leaves.
• Watering: Water when the surface feels dry and the pot is noticeably lighter, after checking that the root ball below is no longer wet. Small pots and brighter, warmer positions dry sooner. Wet the whole root ball and let the pot drain.
• Temperature, humidity and airflow: Keep it at 18–27 °C and above 15 °C, especially when the substrate is wet. Around 45–60% humidity is usually sufficient. If humidity stays below about 40% and edges keep drying, move the plant away from heating or use a humidifier. Normal room airflow is enough; avoid cold draughts and direct hot air.
• Feeding: Use a complete houseplant fertiliser at a low dose every three to four waterings during active growth. Feed less often whenever growth slows, regardless of the season, and never fertilise a dry root ball or a stressed plant.
• Substrate and repotting: Use an open mix of coco coir or peat, small bark and perlite or pumice in a draining pot. Let a newly delivered plant settle in its original pot. Repot when roots fill the container or the mix compacts, using a pot only slightly larger than the root system and keeping the stems at the same depth.
• Leaf care: Remove loose dead material from around the short grouped stems and wipe dusty leaves gently.
• Propagation: Division is simplest: separate a basal shoot after it develops its own roots. Cane sections with at least one healthy node can also root in warm, lightly moist substrate.

Cold damage, drooping and pressure marks on Aglaonema ‘Maria’

• Cold damage: Blackened or water-soaked areas may appear a day or two after cold exposure. Restore warmth and wait until the boundary stops moving before deciding whether the leaf must be removed.
• Drooping: Check pot weight and moisture below the upper layer. Water a dry root ball thoroughly; limp leaves above saturated mix require a root and drainage check. The drooping guide compares the signs.
• Pressure marks: Folds that appeared after transport or cleaning are physical damage. Keep healthy affected leaves and provide more clearance for future growth.
• Pests: Inspect both leaf surfaces and the petiole bases for thrips, spider mites, mealybugs and scale.

Pet safety: Aglaonema ‘Maria’

Aglaonema ‘Maria’ is not pet-safe. Aglaonema contains insoluble calcium oxalate crystals, which can cause immediate mouth pain and irritation, swelling of the mouth, tongue or lips, drooling, vomiting and difficulty swallowing if chewed. Sap may also irritate skin and eyes.

The Greek name behind Aglaonema ‘Maria’

Aglaonema combines Greek aglaos, meaning shining or splendid, with nema, meaning thread or filament. Botanist Dan H. Nicolson rendered the resulting name as “shining stamen” in his monograph of the genus. Heinrich Wilhelm Schott established Aglaonema on 8 September 1829 on page 892 of issue 108 of Wiener Zeitschrift für Kunst, Litteratur, Theater und Mode.