PlantRx

Succulent leaves turning yellow

By Karim DiabatePublished Updated How these guides are built

Yellow leaves narrow nothing down on their own, which is why guessing is expensive. What narrows it down on a succulent 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.

A healthy Succulent, photographed for reference
A healthy succulent for comparison. This is a reference photo, not a picture of the problem. Photo by EriaWei (CC BY-SA 4.0), via Wikimedia Commons.

What is specific to this plant

  • The leaves are the water gauge. Wrinkled and flexible means thirsty; translucent, yellowing and squishy means too much water.
  • Almost every succulent lost indoors is lost to a pot with no drainage, or to a decorative outer pot holding water out of sight.
  • Stretching toward the light, with widening gaps between leaves, is the most common problem of all and it cannot be reversed on the growth that has already stretched.

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.

most common

1. Yellow arriving from the soil line upward

What else you would see

  • the lowest leaves yellowing and softening first, then the ones above
  • the leaves translucent rather than dry as they go
  • the stem darkening where it meets the mix
  • the rosette at the top still looking well
How to confirm it: Follow the yellow downward to the stem and press it there. On a succulent, yellowing that climbs from the soil line is rot moving up the stem rather than leaves being retired, and the top of the plant goes on looking healthy until it reaches the growing point. Papery dry leaves at the base are normal turnover; soft translucent ones going yellow in sequence are not.

What to do

  1. Stop watering and take the plant out of the pot to see how far the softness reaches.
  2. Cut the stem back to firm pale tissue and let the cut callus for several days in the air.
  3. Reroot the sound top in dry gritty mix rather than trying to save the base.
common

2. Overwatering, and the root rot that follows

What else you would see

  • lower leaves going translucent, yellow and squishy rather than wrinkled
  • leaves dropping at the lightest touch
  • a stem that is soft or darkened at the soil line
  • soil or mix still wet several days after watering, when this much should have dried: the whole pot
How to confirm it: Slide the plant out of its pot and look at the roots. Healthy ones are fine, firm and pale. Brown, soft, or hollow when you press them means rot, and that changes what you do next completely.

What to do

  1. Stop watering and let it dry down this far: the whole pot.
  2. 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.
  3. If the roots are soft and brown, trim them back to firm tissue with a blade sterilised first and repot into fresh gritty cactus or succulent mix.
common

3. Not enough light

What else you would see

  • widening gaps between the leaves as the plant stretches toward the window
  • new growth noticeably paler and smaller than old growth
  • the plant leaning hard in one direction
How to confirm it: Stretched growth and shrinking new leaves together, on a plant whose watering is otherwise right. Succulent wants bright light, most kinds wanting some direct sun.

What to do

  1. Move it to bright light, most kinds wanting some direct sun.
  2. Cut back the stretched growth. It will not compact again on its own, and cutting back is what triggers branching.
  3. Turn the pot every couple of weeks so it grows evenly.
less common

4. Underwatering

What else you would see

  • leaves wrinkled and flexible rather than soft and translucent
  • the pot noticeably light to lift
  • growth stalled, with no new leaves for a long stretch
How to confirm it: Dry soil pulled away from the pot wall, with foliage that improves noticeably within a day of a thorough soak. If a thorough watering changes nothing in twenty four hours, stop assuming thirst and check the roots.

What to do

  1. Water thoroughly until it runs freely from the drainage holes, rather than a splash at the surface.
  2. 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.
  3. Water on dryness rather than on a fixed day of the week, and this is how far it should dry: the whole pot.
less common

5. 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
How to confirm it: Sudden onset on the exposed side only, following a temperature change. A leaf resting against cold glass overnight is enough to do it.

What to do

  1. Move the plant away from the glass, the door or the vent.
  2. Damaged tissue will not recover. Leave it unless it turns soft, which is the point at which it can start to rot.
uncommon

6. 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
How to confirm it: Lift the plant out and look. A dense mat of circling roots with very little mix left means the pot can no longer hold what the plant needs.

What to do

  1. Repot one size up in spring into fresh gritty cactus or succulent mix, teasing the outer roots loose.
  2. Feed during the growing season, following the instructions on the label of whatever you buy.
uncommon

7. 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
How to confirm it: Oldest leaves only, while the plant is still producing new ones. A plant funding new growth from its oldest tissue is working normally.

What to do

  1. Remove the spent leaf at its base with a clean blade, purely for looks.
  2. Nothing else is needed.

Common questions

Will a yellow succulent 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 succulent?

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.

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.

Other succulent problems

Not sure which one it is?

PlantRx is an iPhone app that reads the photo and gives you the same kind of ranked differential you just read, for your plant specifically, with the evidence it based each answer on. The first diagnosis is free, in full. There is no subscription and no account.

More about PlantRx