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Colour this confident never asks permission
Family: Araceae · Pot diameter: 13 cm · Height: approximately 40 cm
Aglaonema ‘Siam Red’ turns tropical foliage into a clear colour statement. Glossy blades combine vivid red and pink surfaces with green margins and veins, creating depth that shifts as the light changes.
Compact, upright yet full growth builds a balanced crown approximately 40 cm tall. It has enough intensity to act as a focal point while retaining the calm, polished outline of a well-shaped indoor plant.
The foliage does not rely on a single colour; red, pink and green form layers that create depth and a crisp tropical identity.
Warm pigment spreads broadly across each blade and stays visible even when the plant is viewed from across the room.
Green margins and veins define the red areas, keeping the pattern clear rather than visually flat.
Smooth surfaces catch soft light while closely spaced leaves create a full and carefully finished silhouette.
Why you will love it: vivid year-round colour comes in a manageable, compact shape that instantly energises neutral interiors.
Place it on a side table, plant stand, generous shelf or bright office corner where the foliage is not compressed. Matte black, cream, deep burgundy or natural wood finishes make the red look cleaner and the green appear deeper.
Pair it with calmer greens or linear patterns that also enjoy bright indirect light and stable indoor conditions.
Bright and indirect for full red colour. Softer light is tolerated, but avoid strong direct sun.
Water when the top 2–4 cm of substrate feels dry, then soak fully and allow complete drainage.
Keep conditions stable and warm at 18–26°C, away from cold draughts. Moderate household humidity suits it.
Not pet-safe. Keep it out of reach of animals and young children.
Provide abundant filtered light from an east-facing window or a bright position set back from south- or west-facing glass. Deep shade can reduce colour intensity, while hot sun leaves scorch marks.
Avoid a fixed calendar. Wait until the top 2–4 cm has dried, water until it runs from the base and let the pot drain completely before returning it to its cover pot.
Normal household humidity is usually sufficient. If the air is very dry, a humidifier or plant grouping is more useful than frequent misting, which can mark the glossy blades.
Maintain 18–26°C and protect it from temperatures below 15°C. Cold glass, air conditioning and sudden moves can stress new growth.
Choose an airy aroid mix with an organic component and coarse materials that keep roots oxygenated. Effective drainage matters more than watering frequency alone.
In spring and summer, use a complete liquid fertiliser as directed, around every 4–6 weeks. Repot once roots genuinely fill the container and increase the diameter by only one size.
Aglaonema is an accepted genus in the Araceae family. Heinrich Wilhelm Schott published the botanical name in 1829, and the genus includes tropical evergreen aroids valued for ornamental foliage.
Aglaonema ‘Siam Red’ is sold as a modern cultivated selection of genus Aglaonema. The trade name is used at genus level; a breeder, parentage and documented first-release date are not publicly supplied with the name.
Wild Aglaonema species are native from northeastern India to Papua New Guinea and are associated mainly with humid tropical forest floors. That range describes the genus, not the place where cultivated ‘Siam Red’ was created.
Anthocyanins produce red and pink tones, while chlorophyll creates green areas and supports photosynthesis. Their visible balance forms the leaf pattern.
Research on Aglaonema commutatum ‘Red Valentine’ found anthocyanins in palisade tissue, while chlorophyll occurred in both palisade and spongy tissues.
Light intensity can influence pathways that produce red pigment. Position therefore affects appearance, but this does not justify exposure to sun strong enough to heat and burn the leaf.
As in many aroids, tiny true flowers sit densely on a spadix surrounded by a spathe. Foliage remains the principal ornamental feature of this cultivar.
Useful answers about red foliage, growth and the signs this plant most often shows.
Intensity is influenced by natural leaf-to-leaf variation, leaf age and available light. Provide bright indirect light and judge mature new growth; never expose the plant suddenly to strong sun.
No. Let the top 2–4 cm dry before the next thorough watering. Constantly wet mix reduces oxygen around the roots and increases the risk of rot.
First check for very dry mix, hot or cold draughts and direct sun on the blades. Curling reflects growing conditions and is not a diagnosis by itself.
No. Misting raises humidity only briefly and may leave marks. Stable moderate humidity, clean foliage and distance from radiators or air conditioning are more useful.
Repot when roots have filled the container, water rushes through unusually fast or new growth slows without another cause. Choose a pot with drainage holes, only one size larger.
No, not if chewed. Calcium oxalate raphides can cause immediate irritation, pain and drooling. Keep it out of reach and contact a veterinarian if ingestion or a strong reaction occurs.
