Why are my Pothos Leaves Turning Yellow? (And How To Fix It)

You must have noticed it too… Far too often do we see these beautiful trailing plants, with its glossy, often blotchy, lightly cordate leaves lose their often diachronic shades of green and silver, or green and yellow turn to a sad and unhealthy yellow instead.

What I am I talking about? Pothos, of course…

But Why are the leaves of my Pothos turning yellow?

If you notice a lot of yellowing leaves on your Pothos, it could be a sign of overwatering. A too wet substrate induces rotting of the roots, which is irremediable: the plant can no longer feed itself properly, as a result, the leaves of your Pothos to turn yellow, then it dies. Always wait until the substrate is dry on the surface before watering.

Don’t worry, however, if this is the case with your houseplant; there are remedies and this is exactly what we are going to see together.

8 reasons why your pothos is turning yellow

There can be a few reasons why the leaves of your Pothos turn yellow: it could be that the light is too much, overwatering, the feeding is not correct, underwatering, cold or heat, repotting stress, bacterial leaf spot or simply that the leaf is old.

If your Pothos pant is turning yellow, it could be because of one of the following reasons.

  • Excessive light; this plant does not like too much light, and in particular direct light.
  • Overwatering; a fairly common problem, if you give your Pothos too much water, leaves will start yellowing.
  • Wrong feeding; both too much or too little of a nutrient can cause the leaves of your plant to turn yellow.
  • Underwatering; a very common cause of yellowing with Pothos, as we tend to neglect this plant quite often.
  • Cold and hot temperatures; Pothos likes a fairly small temperature range, anything outside it can turn leaves yellow.
  • Repotting; this plant can suffer from stress after you repot it, causing it to turn yellow.
  • Bacterial leaf spot; this is a widespread disease, common with outdoor crops, that sometimes can affect your Pothos as well.
  • The leaves are just aging; this is a very natural process… most leaves turn yellow before they die.

Getting to know your pothos

Before we move to look at the yellowing of the plant, it is better if we spend a few words on this common, but little understood houseplant.

What we call “Pothos” is no longer classed as a Pothos by botanists… In fact, its name is now Epipremnum, the most common species being Epipremnum aureum.

While we tend to grow it as a trailing houseplant, in the wild, Epipremnum aureum is actually a climber; it comes from the island of Mo’orea, in French Polynesia, but it has become naturalized all over Australia, South and South East Asia, the West Indies and many islands in the Pacific.

In the wild, this plant has actually caused serious problems, as it propagates fast and clings to the trunks of trees becoming very invasive.

Indoors, we tend to see small plants, but in the wild it can grow to be 4 to even 8 meters tall (13 to 26 feet)!

Toxic to cats and dogs, it is an excellent air purifier, as it can absorb and remove many indoor pollutants like benzene, xylene, toluene and other chemicals.

Still, despite being a strong plant full of vitality, it often happens that its leaves turn yellow. So, let’s see why and what to do about it…

Pothos leaves turning yellow: is it too much light?

Pothos leaves turning yellow_ is it too much light?

When a Pothos plant receives too much light, its natural defense is to reduce the production of chlorophyll and increase that of other pigments, which are natural “sunscreens”.

In fact, chlorophyll does not photosynthesize well with strong UV lights, but other pigments, anthocyanins (which are red to purple) and carotene (which is yellow) do.

So, the plant will favor these, causing the leaves to change color.

These plants like to climb onto the trunks of tall tropical trees in the wild… Now, imagine a tropical forest…

How much light do you get through the canopy? 

Very little indeed.

This should give you a clue… Epipremnum aureum does not like too much and especially direct sunlight.

So, if the problem is too much light:

  • The leaf may lose color first; instead of becoming of a strong yellow color straight away, it will pass through a phase where it is clearly “losing green” both as area and as quality of color.
  • The yellow color will tend to darken.
  • The yellow may turn into brown, but dry; this will normally happen at the edges, with a phenomenon known as edge burn.

If you notice these symptoms, move the plant to a better, place:

  • Pothos likes south facing or west facing windows. Avoid east facing windows at all costs; the light may be far too strong there.
  • Make sure it is not directly in front of a window; this will almost invariably cause the leaves to yellow and develop edge burn.
  • Make sure that light is diffused for your Pothos.
  • Prune off the yellowed leaves if you wish. This is not strictly necessary, you may want to just let them wilt and die naturally, but for aesthetic reasons, you may do this.

Pothos leaves turning yellow: is it overwatering?

Pothos leaves turning yellow is it overwatering

Overwatering is a common cause of yellowing leaves on your Pothos. Too much water in the tissue of the plants causes damage to the cell walls; these can break and die, which will make the tissue turn yellow.

So many people tend to overwater plants; even a tropical plant like Pothos can has a limit though. It is far too easy to cause rotting with overwatering.

Having said this, Pothos is often grown hydroponically (often using simply a jar or vase to grow it).

But there’s a huge difference between wet soil and roots in water. In the first case, the problem is that bacteria and pathogens find the perfect breeding ground… And that causes rotting.

Always wait (with some exceptions, some plants needing very moist soil on the contrary) until the substrate is dry before watering. Do not leave stagnant water in the saucers: most plants do not like having their feet in water!

How can you see if it is excessive watering?

  • The leaves will turn yellow but also soften and lose shape. They will drop, became flaccid and soft.
  • The yellow will tend to be of a matt ochre shade.
  • The yellowing occurs on several leaves in different parts of the plant...
  • The yellowing may develop rather fast.

In case this is your problem, you have two courses of action, depending on the gravity of the situation.

If you see that only a few leaves have turned yellow, but most are healthy, and, especially, there is no sign of damage at the base of the stem:

  • Using a sterile blade, cut the yellowed leaves off. This is necessary to stop the rotting. Overwatered plant tissue may carry disease and pathogens to the rest of the plant.
  • Suspend watering. This should not be for too long though. Allow the top inch of the soil to dry before watering again.
  • Reduce watering slightly.

If you notice that most of the plant has been affected, especially at the base, or simply of you are afraid that the plant has caught root rot:

  • Uproot the plant.
  • Use a soft brush and clean the roots.
  • Check the roots; if you notice any blackening, then it definitely is root rot.

In this case, you can either try to save the plant or propagate it, according to how badly damaged it is.

To save the plant:

  • Use a very sharp and sterile blade (a pruning knife should do) and cut off all the yellowed leaves, stems and, absolutely, all the rotting roots. Only leave clearly healthy ones.
  • Sprinkle some organic sulphur powder on the roots.
  • Put the Pothos in a fresh and shaded, but ventilated place for an hour or two.
  • Prepare a pot with new potting soil; even better if the pot is new.
  • Repot your plant.

If you notice that the roots are damaged beyond repair, then your only chance may be to propagate the plant.

  • Take a sharp and sterile blade.
  • Find a stem with at least four or five healthy leaves on it.
  • The stem should be at least 4 inches (10 cm) long, possibly even 6 inches (15 cm).
  • Remove the lower leaves, and only leave one to three at the top.
  • Cut the stem as low as you can, with a sharp and neat cut.
  • Correct the cut if necessary.
  • You can now put it in a jar of water in plenty but indirect light and within about one month, it will start rooting.

Alternatively, after having prepared your cutting:

  • Prepare a pot with good potting soil, a mix of peat moss and perlite and sand is good.
  • Mix a tablespoon of apple cider vinegar in a bowl of water (this is a natural rooting agent).
  • Dip the base of the cutting in it.
  • Finally plant it in the pot, with at least two nodes in the ground and place it somewhere with plenty but diffused light.

Pothos leaves turning yellow: is the feeding wrong?

Pothos leaves turning yellow: is the feeding wrong?

Of course, the nutrients you give to your plant have an effect on its metabolism.

Excess of some nutrients as well as lack of some can affect its growth rate as well as its chlorophyll production, which, in some cases, results in yellowing. We’ll see which nutrients in detail here.

When is love “too much love”? Maybe it is only so when we act unwisely because we love someone… or something!

Well, a bit like a mother that makes a child obese because she feeds him too much, or makes him sick because she feeds him the wrong food, we can get similar problems with Pothos (and all plants, actually).

Pothos leaves can turn yellow for three reasons when it comes to feeding:

  • We give it too much fertilizer.
  • It suffers from nutrient toxicity, which is when it has too much of one nutrient.
  • It suffers from nutrient deficiency, which is when it receives too little of one nutrient.

The best way to go about it is to learn how to fertilize your plant. Use an organic and balanced fertilizer to start with.

Now, with Pothos, most people use a 10-10-10 or 20-20-20 NPK (nitrogen – phosphorus – potassium) fertilizer, which is the most common with houseplants, though 19-16-12 NPK is better indicated for this plant.

Never feed it more than once a fortnight. Actually, once a month is perfectly fine, and even every three months just from spring to fall will be enough for most plants. This is from April to October. Reduce or suspend feeding in winter.

What happens if the plant suffers from nutrient toxicity?

On top of turning yellow, the leaves will, usually, also burn at the edges.

What can you do about it?

  • To start with, reduce feeding.
  • Second, check that you are giving it the correct fertilizer.

But this may only be enough if the plant has minor damage. If it is serious, you will need to take more drastic steps:

  • Uproot the plant.
  • Clean the roots using a soft brush.
  • Prepare a new pot with new compost.
  • Repot the plant.

In fact, if the soil is now too rich in nutrients, just changing your feeding routine will not be enough, as the plant will still absorb an excessive amount of minerals from those stored in the soil.

But how about mineral deficiency? What happens if the plant is, for lack of a beret word, “starving”?

Now, the lack of different nutrients will give different symptoms. These are often accompanied by other symptoms, like leaf deformity for example.

  • If the Pothos lacks nitrogen, the yellowing follows a loss of green and it usually starts at the tips then spreads to the rest of the leaf. This is also accompanied by the plant stopping or slowing down its growth and a general lightening of all the leaves.
  • If the Pothos lacks magnesium, you will notice a condition called chlorosis; this is when you see yellowing in patches between the leaf veins. After this, you will find another effect, known as necrosis, which is when parts of the leaf (or whole leaves) die.
  • If the Pothos lacks iron, while the veins of the leaves will remain green, the surface in between the veins will turn yellow.

How can you solve these problems? In case you are growing Pothos professionally, you may wish to add compost that is rich in the lacking element, but for most people, the solution will be much simpler:

  • Change your fertilizer and make sure that it contains the lacking nutrient.
  • In case of nitrogen deficiency, you can choose a fertilizer with a higher first NPK number, but don’t overdo it.

Pothos leaves turning yellow: is it underwatering?

Pothos leaves turning yellow: is it underwatering?

Chlorophyll needs water to function properly; when it is scarce, the plant will reduce the photosynthetic process (usually in localized areas), thus turning part of its tissue yellow.

This may be a much more common cause of yellowing than most people think.

Why? We tend to put Epipremnum aureum on top of cupboards and then leave them there, draping their branches over our book case or family photographs…

Then, we forget about them and even forget to water them regularly.

If the problem is underwatering, you will find it easy to find it out:

  • The leaves will yellow starting at the tips.
  • The leaves will also curl down.
  • The leaves will dry up.
  • The leaves will droop.

In this case, your only solution is to start watering again… However…

  • Do not overwater your plant. This may actually cause stress to the plant. We do the same with Humans, don’t we? If the plant is very dry, it will also be overwhelmed if you give it too much water.
  • Give it room temperature water; cold water will cause shock to the plant, and, remember, it is very vulnerable at this stage.
  • You can cut the yellow leaves, but this is only for aesthetic reasons, as they are dry, therefore they will not carry disease.

Pothos leaves turning yellow: is the temperature too hot or too cold?     

Pothos leaves turning yellow: is the temperature too hot or too cold?

Excessive heat and cold can damage the tissue of your Pothos plants; this happens either through excessive evaporation of water or because the cells within leaves and stem die. This too often results in yellowing of the plant.

These are plants that come from warm but sheltered places, remember? This makes them very susceptible to sudden changes of temperature.

They prefer temperatures between 65 and 85oF, which is 18 to 30o on the more rational Celsius Scale.

Anything below this temperature starts being a gray area; depending on the plant, it may manage it or start suffering, in any case, never expose it to temperatures under 60oF (16oC) and be sure that under 55oF (13oC) your plant will be damaged.

Similarly, if the temperature goes above 90oF (or 32oC), the leaves may start yellowing due to the heat.

Even cold air can damage your plant; so, keep it far from draughts and windy places.

How can you tell if the cause is a change of temperature?

Apart from your knowledge and memory of changes of temperature, if it is too cold or too hot, the leaves will tend to turn into a whitish-yellow shade.

Of course, there are a few things to do to avoid or remedy this:

  • Do not put your Pothos near an air conditioner, especially in summer.
  • In winter, keep it at a safe distance from heaters, fireplaces and stoves.
  • Do not put Pothos near windows, especially draughts ones, or on window sills.
  • Keep an eye on your plant’s reaction when you change its place.
  • Place pothos where the temperature is constant; avoid places where it is hot during the day and cold at night, or where the temperature fluctuates a lot from season to season.

Pothos leaves turning yellow: have you just repotted it?

To understand the reason why plants may turn yellow (again often starting as a localized phenomenon) when you repot them, you need to understand both the metabolism of plants and their psychology.

Plants often do not like changes; they are designed to live in once place. A change of place can mean that they need to adapt to a totally new environment, and this can cause them stress.

What is more, when a plant finds new soil, it tends to take time before its roots start actually “liking it”.

These two processes often force the plant to retain energy and diminish its metabolic functions, thus reducing photosynthesis and energy production.

Thus, they will sacrifice some leaves to preserve others, and the ones they cannot sustain will stop the production of chlorophyll, which will make them turn yellow.

This plant does not like to change home. On the whole, Pothos likes to be left in peace.

This makes it an ideal and low maintenance houseplant, but it also means that it may respond negatively to repotting, often with stunted growth and sometimes even yellowing.

To avoid any shocks when repotting your Epipremnum aureum:

  • Wait till the beginning of the vegetative phase to repot it. This is in spring, when the plant starts growing again. This is when the plant is full of life and, above all. When it grows its roots fastest.
  • Water your plant the day before repotting it.
  • Wet the potting soil in the new “home” of your plant before you actually plant it. This will provide a more even distribution of the humidity in the soil and help the roots find it comfortable.

Pothos leaves turning yellow: is it bacterial leaf spot?

Pothos leaves turning yellow: is it bacterial leaf spot?

Some bacteria can literally ruin the tissue of plants, killing some of the cells within the leaves) sometimes even in the stems), which of course, will then turn yellow or brown.

How about if the reason of the yellowing is so small that you can’t see it with the naked eye? Well, don’t worry, because you will still be able to notice the symptoms, even if it is what we call bacterial leaf spot, that is, of course, a disease caused by bacterial infection:

  • The yellowing will appear in isolated spots. These will have a diameter comprised between 3/16 and ½ inch (0.45 and 1.3 cm).
  • The yellowing will be followed by a dark brown center.
  • The spots will then appear as two rings; an outer yellow “halo” and a central dark spot.
  • They can appear both on top and on the bottom of the leaf.
  • The spots are irregular.
  • They can also appear on the edges of the leaves of your Pothos.

What should you do if this is your case?

  • First of all, cut all the affected leaves; this will slow down or (hopefully) prevent the spreading of the infection.
  • Use neem oil to stop the infection. Spray it on the leaves.

This will cure the plant from the infection, but it will not prevent it or solve the root causes.

In fact, Pseudomonas species (this is the name of the genus of bacteria that cause the spots) like moist and cool conditions in the ground, but warm temperatures to spread fast (between 77 and 86oF or 25 to 30oC).

Basically they find a good “corridor” in moist organic matter (your compost) and then reproduce like rabbits (actually faster) when it is hot.

So, careful with watering and, in case you are worried: Repot the plant in new soil and in a new pot. This will eliminate the infection from the soil.

Pothos leaves turning yellow: are the leaves just old?

Pothos leaves turning yellow: are the leaves just old?

Maybe you have worried for no reason at all… In the end, leaves turn yellow and then brown when they are old…

This of course, will happen to the old leaves on your plant and not the young ones, and this should tell you that it may just be the normal process of aging…

In fact, plants stop photosynthesis and withdraw all energy from old leaves before they die; this leaves, at first other pigments in the leaves to bring the leaf slowly to its death.

Depending on the plant, these will be yellow or along the red scale (or both).

It is a sad, but fully natural ageing process, and, on the positive side, it gives us that explosion of colors we see every fall in temperate climates.

Fifty shades of yellow

As you can see, there are many reasons why your Pothos may be turning yellow, form over watering to underwatering, from too much heat to too much cold, from bacteria to incorrect feeding, from sunlight to repotting and even, in many cases, just because your plant is shedding its oldest leaves.

All however, are treatable, and, especially of you find out the cause of the problem, early on, you can solve these problems without hassle and successfully.

The point is that you need to understand how the coloring happens, when, where and which type of yellow it is first…

There are enough “shades” to this problem that you could even write a whole novel about it, or, with an image I would prefer, even paint a radiant masterpiece as Van Gogh did with his favorite color.

Updated on by Amber Noyes

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