In this guide to how to identify and prevent peace lily disease you will learn how you can identify and deal with the lily disease in your garden, but first, let the summary of what you will learn.


As you will be learning, most of these diseases start from the commercial nurseries where large numbers of plants are propagated and grown which is in close proximity.

For you to keep the foliage of peace lily dry, then you must water peace lily only when the top inch of soil is dry, and also provide your peace lily plant with enough light and you will not see this disease in your garden.


Peace lilies, also known as Spathiphyllum spp. Are among the houseplant that is easy to grow but when the right care is not provided or take it may suffer from a disease which will destroy it and limit its growth.

Peace lilies are also called perfect houseplant by many people because it been easy to grow.

You may have read how to grow and care for lilies in our garden guides and we were able to let you know how to grow it indoors. For you to have the best result from peace lilies you have to grow it or cultivate at a place that receives more or direct sunlight which is bright from let’s say about 6-8 hours and should be grown on a well-draining soil.

Peace lilies fertilizer applications must be done at least once in a month at the growing stage or season, watering of peace lilies watering must be when the soils are dried out, and all that lilies need to be happy is repotting.

Though as it does not happen most often is that this houseplant or tropical foliage plants can be a hunt and kill by disease. But fears NOT. Why?

Because in this how to identify and prevent peace lily diseases will help dive into the common diseases that can affect peace lilies and what can to solve or help for it not get consumed by diseases.

It becomes challenging to gardeners who plant or grow peace lilies on a large scale who grow it for the purpose of selling it.

To avoid these issues of diseases affecting you must be able to purchase your lily from a very good and a renounce nursery and you have to check it before transporting it home.

To make a good purchase of lily then you to choose or select the lily with healthy specimens and you have to avoid lily which leaves are yellow, which is also been mould on the surface of the potting soil and wilting foliage.

In this garden guide in how to identify and prevent peace lily disease, we will cover four (4) most common diseases that often affect peace lily. Let start


Cylindrocladium root rot is one of the diseases that often cause peace lily and is a fungal infection which is caused by Cylindrocladium spathiphyllum.

And your lily houseplant can be exposed to the possibility of being attacked or harmed by cylindrocladium root rot when you overwatered your lilies or when you’re in the soil is at the state of being without or not having enough drainage.

This type of fungus infection can destroy or damage the whole of the lily root system within a few weeks or in months when the soil is warm or in moist conditions.

It is not easy to identify for the reason been that the rot can continue growing for many weeks before the peace lily will expose any symptoms of any fungus infections on its leaves.

Most often the first thing that you can identify about this fungus infection is that the lilies lower leaves become yellow and possibly wilting foliage.

When you take close examinations you will identify that the leaves and petioles may also have dark and brown spots to a higher degree than is usual or average the lower portions of the petioles.

By the time you are able to identify the state of being discoloured, then it may be possible that the roots are rotten in intense degree hence you have a little hope of saving your peace lily. All that you have to do is to get rid of the lily plant including the soil from the pot into the bin.

If you want to reuse the pot for another peace lily then the pot must be sterilized because the fungus infection create very infectious resting structures in the pot called sclerotia that can survive in the soil and organic matters what is why you have to get rid of it or sterilization is needed.


This kind of virus makes the lily leaves change color to a pattern of yellow to light green on the new leaves of the plants which are infected.  Dasheen mosaic virus does not cause much to the lily plant but it makes the plant reduce its growth or it fails to thrive.

Dasheen mosaic virus is been spread between lily plants through insects, like aphids, infected potting soil or gardening tools.

This kind of peace lily virus does not have a cure and its does also show any effect or any ill sign aside the discoloured foliage, but note that this virus can also affect another houseplant such as anthurium, dieffenbachia and also philodendron.


Phytophthora nicotianae is been molded by water which actually makes the leave of the lily becomes a blight on the large difference of plants.

This very kind of disease is been spread by water splash. When the lily leave becomes high in moisture and the humidity level is also high then the lily becomes the most suitable condition for infection.

The common symptoms of Leaf blight diseases are leaf margins and make centres that have black or brown dead spots on the leaves. But if the condition of the plants is moist then the spots of the plant leaf will look wet and mushy.

Moreover, if the foliage is dry then the leaf will also become dry and as the leaf blight grows the spots will spread into larger lesions.

The lily leaf that its tissue been damaged can also control by another fungus that can turn the appearance of the disease.

But the good news is that if you are able to see it earlier then you can apply or try plant repotting into new, but you must sterilize the used container, and use new sterile potting soil.

The part of the leaf that is damaged must be cut off and get rid by putting it into the trash bowl again dispose of all the potting soil accompanied by the plant. And if you want to use the container again then you have to free the container from bacteria or other living microorganisms. (Sterilization)


  1. Note that you can use the disease control fungicide instantly after you have done with repotting, and you are encouraged to use according to the instructions on it.
  2. You can also water the base of the lily plant in other to keep the foliage dry and that can help to avoid pathogen from taking root or lead in this case.


Pythium root rot is also caused by water mold; the infected plants leave with this mold of water normally becomes yellowish and wilted color.

Since it is not easy to identify these diseases early but the time you will identify the symptoms on the foliage, the root of the lily may have been black and mushy.

Pythium root rot is not easy to differentiate it from cylindrocladium root rot, but the most notable difference here is that with the Pythium root rot the petioles are typically not affected.


Overwatering of the plant should be avoided, and water at the soil level and make sure that you lily plant has well-draining potting soil. Because the damp conditions help or favor the development of these diseases,

The early-stage treatment of this kind of diseases is not different from the cylindrocladium root rot, meaning repotting into the fresh mix and a soil drench using the Monterey agric for disease control fungicide.

Your peace lily plant may severely infect, and the best way to deal with it is to start over with a new plant. And don’t forget to dispose of all infected potting soil and plant debris in the trash bin.

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