Aglaonema Cutlass stands out in the aglaonema family for its shape. Instead of broad, rounded leaves it has narrow, sword-like leaves in silvery green with a dark green edge, held more upright than most aglaonemas. The result is a slimmer, tidier plant that suits a narrow shelf or a spot where a wide, spreading plant would crowd its neighbours. This guide covers light, water, humidity, soil, feeding and the common problems that show up when something is off.
Cutlass is sometimes sold as a low-light plant, and it does tolerate it — but its narrow leaves are its signature, and in very low light new leaves come out smaller and the plant stretches. Medium indirect light keeps the shape compact and the silver colouring bright. Otherwise its care is classic aglaonema: let the soil dry between waterings, keep it warm, and leave it alone.
Aglaonema Cutlass at a glance
| Care factor | What this plant needs |
|---|---|
| Botanical name | Aglaonema 'Cutlass' |
| Light | low to medium indirect |
| Water | every 1–2 weeks; let top soil dry |
| Humidity | moderate |
| Temperature | 65–80°F (18–27°C) |
| Repotting | every 2–3 years |
| Pet safety | toxic to cats and dogs |
Light
Low to medium indirect light suits it, with medium indirect light giving the best shape and colour. A spot near an east-facing window or a few feet from a brighter window is ideal. Direct sun scorches the narrow leaves, and very dim light stretches the plant and shrinks new leaves.
Too little light is the more common mistake with this plant than too much. Growth slows, stems stretch towards the window, and new leaves come out smaller and less distinctive than they should be. If the plant leans hard in one direction, rotate the pot a quarter turn every couple of weeks so it grows evenly. Our grow-light calculator can help work out how much light your spot actually provides, and the houseplants hub has more plants that suit the same light levels.
Watering
Water every 1–2 weeks; let top soil dry. Push a finger into the soil and only water when the top has dried to the depth the guidance suggests. When you do water, water thoroughly — soak the soil until water runs out of the drainage holes — then empty the saucer so the plant never sits in standing water. Soggy soil is the fastest way to kill most houseplants, and it is far more common than underwatering.
Water less in winter, when growth slows and the soil stays wet longer, and more in summer, when the plant is actively growing. If you are unsure how much water your pot needs, our watering calculator gives a starting point, and our watering schedule generator can help you build a routine. Signs of overwatering include yellowing lower leaves and soft, dark stems; signs of underwatering include drooping leaves and dry, crispy edges.
Humidity and temperature
Aglaonema Cutlass prefers moderate humidity and temperatures of 65–80°F (18–27°C). Most homes sit within that temperature range for most of the year, so temperature is rarely a problem indoors — the things to watch are cold draughts in winter, radiators that dry the air, and cold windows that chill the leaves overnight. Keep the plant away from all three.
Humidity is the factor most people underestimate. In a heated home in winter the air can be much drier than this plant likes, and the first sign is usually brown, crispy leaf edges. A pebble tray under the pot, grouping plants together, or a small humidifier all raise the humidity around the plant. Misting does very little — the water evaporates in minutes. Our humidity and temperature checker can tell you whether your room suits this plant.
Soil and potting
Indoors, this plant needs a free-draining potting mix. Standard potting soil on its own holds too much water and compacts over time, so mix it with perlite and bark to keep air around the roots — the roots need oxygen as much as they need water. A pot with drainage holes is not optional; without one, water has nowhere to go and root rot follows. Our potting-mix calculator can work out the parts for a homemade mix for your pot size.
Choose a pot that fits the root ball with a little room to grow, not a much bigger one. A pot that is too big holds wet soil the roots cannot use, which is one of the most common causes of root rot in houseplants. If you are reusing a pot, wash it first so no old salts or pests carry over.
Repotting
Repot every 2–3 years, or sooner if roots are circling the drainage holes or pushing out of the top of the pot. Move up only one pot size — a pot that is too big holds wet soil the roots cannot use. Spring is the best time to repot, when the plant is about to grow, and fresh mix gives the roots a new supply of air and nutrients. Our repotting calculator can help you work out the next pot size and how much fresh mix you will need.
Feeding
Feed during the growing season, in spring and summer, with a balanced liquid houseplant fertiliser, and do not feed in autumn and winter when the plant is barely growing. Always follow the directions on the label — more fertiliser is not better, and excess salts build up in the soil and burn the roots, which often shows up as brown leaf tips. If you have been feeding heavily, flush the soil with plain water every few months to wash out the salts.
Propagation
Aglaonema Cutlass is propagated from stem cuttings or by division. In spring, cut a stem with a few leaves and root it in water or moist mix in a warm, bright spot, or divide a mature clump at repotting time, keeping roots on each section. Cuttings root slowly — allow several weeks before judging them.
Common problems and fixes
| Problem | Likely cause | Fix |
|---|---|---|
| Leggy Stems | too little light | See below |
| Root Rot | soggy soil | See below |
| Yellow Leaves | overwatering | See below |
Leggy Stems
Likely cause: too little light. Move the plant to brighter indirect light and prune back the longest stems in spring. The cuttings can usually be rooted, and the plant will bush out from below the cuts.
Root Rot
Likely cause: soggy soil. Take the plant out of its pot, trim away any black, mushy roots with clean scissors, and repot in fresh, free-draining mix in a pot with drainage holes. Water less going forward and let the top soil dry between waterings.
Yellow Leaves
Likely cause: overwatering. Let the soil dry more between waterings, check the pot drains freely, and remove the leaf once fully yellow. One yellow old lower leaf is normal ageing; several at once points to watering.
Is aglaonema cutlass safe for pets?
According to the data used for this guide, aglaonema cutlass is toxic to cats and dogs. Keep the plant out of reach of curious pets, especially if it trails where a cat can reach it, and contact a vet if your pet has eaten any of it.
Frequently asked questions
How often should I water aglaonema cutlass?
Water every 1–2 weeks; let top soil dry. Check the soil rather than watering on a calendar: if the top of the soil is still damp, wait. Water thoroughly when it is time, let the excess drain away completely, and never let the plant sit in standing water.
What light does aglaonema cutlass need?
It needs low to medium indirect light. A spot near an east-facing window or a few feet from a brighter window is ideal. Direct sun scorches the narrow leaves, and very dim light stretches the plant and shrinks new leaves. Harsh direct sun can scorch the leaves, while too little light leads to slow, stretched growth and a loss of colour or pattern.
Is aglaonema cutlass safe for cats and dogs?
According to the data used for this guide, aglaonema cutlass is toxic to cats and dogs. Keep it out of reach of pets that chew plants, and if a pet eats any of it, contact your vet.
When should I repot aglaonema cutlass?
Repot every 2–3 years, in spring, or sooner if roots are circling the drainage holes. Move up one pot size only and use a fresh, free-draining mix. Our repotting calculator can help with the next pot size.
Why are the leaves on my Cutlass getting smaller?
Smaller new leaves usually mean too little light. Move the plant to medium indirect light and the new growth should come out larger and more upright. Also check that the plant is not root-bound, which can slow growth too.
Does Aglaonema Cutlass need a lot of humidity?
It prefers moderate humidity and does fine in most homes. Brown leaf tips are the sign the air is too dry or fertiliser salts have built up — raise the humidity a little and flush the soil occasionally.
Related guides
Browse the full houseplants hub for more species care guides, or explore the tools hub for calculators that help with watering, light and repotting.