Anthurium yellow leaves
Yellow leaves narrow nothing down on their own, which is why guessing is expensive. What narrows it down on an anthurium is not the colour but everything around it: which leaves went first, what the mix feels like two inches down, and what the roots look like.
What is specific to this plant
- Anthuriums are epiphytes. Potted in ordinary dense potting soil they suffocate slowly, and the symptom that follows looks exactly like overwatering because it is.
- The coloured part is a spathe, not a petal, and it browning with age is ordinary rather than a sign of illness.
What it could be, and how to tell
These look alike in a photograph, so each one below lists what you would ALSO see if that is the cause. Work down the list and stop at the one where the other symptoms match too.
1. Overwatering, and the root rot that follows
What else you would see
- the flower stalks collapsing while the leaves above them still look well
- leaf stalks blackening at the point where they leave the crown
- each new leaf opening smaller and darker than the one before it
What to do
- Stop watering and let it dry down this far: the top inch or two.
- Check that the pot drains and empty any saucer or decorative outer pot it sits in. Water held out of sight keeps the mix wet whatever you change above it, and it stays invisible until you lift the pot.
- If the roots are soft and brown, trim them back to firm tissue with a blade sterilised first and repot into fresh very airy, bark-heavy mix.
2. A stem that has climbed out of its own root system
What else you would see
- a bare woody stem standing clear of the mix, with the leaves all held above it
- stubby roots coming out of that stem into open air and going no further
- the oldest leaves at the bottom yellowing one after another while the crown keeps producing
- the plant looking as though it is slowly pushing itself up out of the pot
What to do
- Repot deeper, burying the bare stem so that the aerial roots along it sit in the mix rather than in the air.
- Use an airy bark-heavy mix rather than dense compost when you do it, since the roots you are burying are adapted to air.
- Cut the top off below a set of aerial roots and pot that section on if the stem has grown too long to bury, which is the standard way this plant is renewed.
3. Underwatering
What else you would see
- leaf edges going papery and curling under while the stalks stay firm
- the newest leaf failing to unfurl completely and drying at the tip
- flowers turning green and drying early while the rest of the plant looks well
What to do
- Water thoroughly until it runs freely from the drainage holes, rather than a splash at the surface.
- If the mix has gone water-repellent and the water runs straight through, stand the pot in a basin of water for half an hour to rewet it properly.
- Water on dryness rather than on a fixed day of the week, and this is how far it should dry: the top inch or two.
4. Not enough light
What else you would see
- long bare stretches of stem between the leaves
- each new leaf smaller than the last
- lower leaves shed while the growing tip carries on
What to do
- Move it to bright indirect light.
- Cut back the stretched growth. It will not compact again on its own, and cutting back is what triggers branching.
- Turn the pot every couple of weeks so it grows evenly.
5. Too much direct sun
What else you would see
- bleached, pale patches rather than an even colour change
- damage only on the side or the leaves facing the window
- leaves warm to the touch in the afternoon
What to do
- Move it back from the glass or filter the light. Anthurium wants bright indirect light.
- Bleached tissue does not turn green again. Judge recovery by whether NEW leaves come in a healthy colour.
6. Cold or a draught
What else you would see
- damage that appeared within a few days of a cold snap, or of the heating or air conditioning coming on
- the plant sits near a window, an exterior door or a vent
- the damage is worst on the side facing the cold
What to do
- Move the plant away from the glass, the door or the vent.
- Damaged tissue will not recover. Leave it unless it turns soft, which is the point at which it can start to rot.
7. Rootbound, or soil that is worn out
What else you would see
- roots circling the inside of the pot or escaping the drainage holes
- water running straight through with almost no absorption
- two or more years in the same pot, and smaller new growth each season
What to do
- Repot one size up in spring into fresh very airy, bark-heavy mix, teasing the outer roots loose.
- Feed during the growing season, following the instructions on the label of whatever you buy.
8. Ordinary ageing
What else you would see
- one or two of the oldest, lowest leaves at a time and no more
- healthy new growth continuing from the centre or the tip
- no other symptom anywhere on the plant
What to do
- Remove the spent leaf at its base with a clean blade, purely for looks.
- Nothing else is needed.
Common questions
Will a yellow anthurium leaf turn green again?
No. Once a leaf has yellowed, that leaf is spent and the plant has already withdrawn what it could from it. Fixing the cause stops the next leaves going the same way; it does not restore the ones already gone.
Should I cut the yellow leaves off my anthurium?
Once a leaf is more yellow than green, cut it off at the base with a clean blade. While it is only edged with yellow, leave it: the plant is still reclaiming nutrients from it.
How do I tell overwatering from underwatering?
Feel the mix a couple of inches down and feel the stem at the soil line. Wet mix with a soft stem is overwatering. Dry mix pulled away from the pot with firm stems is underwatering. From above the leaves look much the same, which is how a drowning plant ends up being watered again.
Is an anthurium poisonous to cats, dogs or children?
Anthurium contains calcium oxalate crystals and is widely listed as harmful to pets and children if chewed. We do not tell you that any plant is safe. If a pet or a child may have chewed any part of one, contact a vet, or Poison Control on 1-800-222-1222 in the US, immediately rather than waiting to see what happens.
Before you act on any of this
This is general plant care guidance for a plant, not advice about people or animals. We never tell you whether a plant is safe to eat or touch, and we never tell you a plant is safe for a child or a pet. If a child or animal may have eaten any part of a plant, contact Poison Control (US 1-800-222-1222) or a vet immediately rather than reading further.
Treatment advice here is deliberately category level. We do not give product names, mixing ratios or application intervals. Whatever the label on the product in your hand says is the instruction that counts, and following it is your responsibility.
Where this comes from
The general horticultural facts behind this differential come from published university extension and Royal Horticultural Society guidance. What is specific to this plant, and the order the causes are ranked in, is ours, and the methodology page says where that reasoning stops being reliable.
- Diagnosing Houseplant Problems from Improper Environmental ConditionsIowa State University Extension and Outreach
- Root Rots on HouseplantsUniversity of Wisconsin-Madison Division of Extension
- Indoor Plants: WateringClemson Cooperative Extension Home and Garden Information Center
- Low Light Impacts on Indoor PlantsUniversity of Maryland Extension
- How to grow houseplantsRoyal Horticultural Society
Other anthurium problems
Not sure which one it is?
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