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What Causes Black Leaves On A Peace Lily?

Ask The Expert:
I have a Peace Lily and I am noticing that some of the leaves (at the tips) are turning black. What is causing that?  I have been cutting off the black parts, is that OK?
Thank you for your time.  bfh

Plant Expert Reply:

There are 3 things that can cause peace lilies to turn black.

The first is a water issue – too much or too little.  With water the leaves turn brown first then black.

The second is exposure to an extreme temperature change.  Exposure to extreme cold will turn the peace lily leaves black.  Exposure to extreme heat or sunlight usually causes a yellow/brownish discoloration before it becomes black.

The third is a fungus called Phytophthora (aerial blight).  With this  fungus you need to keep water off the foliage – that is how the fungus spreads.  You may need to treat both the soil and the foliage with a fungicide.  Check with your local nursery & garden center for the appropriate fungcide.

This plant disease discussion was brought to you by Flower Shop Network.

Comments

  1. Francis Sealover says:

    In reading your advice I should have not mist my leaves. Would it hurt to use plant shine on the leaves to make them shine. It seems to loose it’s luster. Thank you
    Francis

  2. Francis,

    Yes there is a variety of commercial leaf shining products that you can purchase at your local nursery or retailers. Remember to wipe down the leaves once a week to get rid of dust. You can use a soft washcloth, warm water and soap to clean the leaves.

  3. ginnie cates says:

    i have had my lily since 2009 she has split into 4 separate stocks in a giant pot but her leaves are looking burned ripped and crumbly I keep her shaded she is very very special to me as she was gift after cancer removal I am desperate to get her healthy and happy again

  4. Jamie Woods says:

    Ginnie,
    Has you lily been exposed to any sudden temperature changes? This can sometimes cause issues until the plant acclimates. How frequently are you watering your lily? Over-watering and underwatering can both cause issues. Check your soil and make sure that it is evenly moistened, but not soggy. Chlorine in the water can also cause problems with Peace Lilies, so make sure to always use distilled water, or tap water that has set out for 24 hours to water your plant. There is also a fungus called Phytophthora that can cause the leaves to turn. If this is the problem, you need to keep the water off of the foliage because this is how it spreads. If the fungus is your problem, you may need to treat the soil and foliage with a fungicide. This can be found at your local nursery.

  5. I have the lily plant since Christmas 2016″ The plant was very healthy and growing nice until about two weeks ago. I watered when I feel the top soil is dry about once a week. I keep the plant in the living room..no change in temperature. Around the edges off the leaves stated turning black. I cut the black off. Shortly after seeing the leaves turning black agaiin I’m changing the soil and rinsing the roots under water for about an hour just in case it is fungus.

    .

    ust have to wait a

  6. Jamie Woods says:

    Have you checked the water farther into the soil to make sure your plant isn’t getting too wet or dry? Instead of just feeling the top of the soil, stick your finger down into the soil to the first knuckle. Pull our a little soil and try to roll it into a ball. If it rolls into a ball and water comes out when you squeeze it, then it is getting too much water. If you can’t roll it into a ball at all, the soil is too dry. If you can roll it into a ball, but no water comes out when you squeeze it, then your water level is good. Also, make sure it has good drainage.

    If it is a fungus, most likely aerial blight (Phytophthora), you will need to treat your plant with a fungicide from your local nursery. Make sure to keep water off the leaves, because this is how aerial blight spreads.

  7. I recently reported my peace lilly and at the same time split into two.it was growing fine for the first few wks with new shoots growing,then then the ends of the leave started to turn black and wilt.I don’t think it’s from over waterin.But I’m woundering weather the soil is to rich or
    Weather it is from a fungle,as I used a compost that I made my self from organic matter.?

  8. Jamie Woods says:

    Have you checked the water level of your soil? Underwatering can also cause the leaves to turn black. If you think that it is a fungus, check with your local garden center or nursery to get the appropriate fungicide.

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