Why do indoor lilies turn brown?

1. Introduction
2. Causes of Brown Leaves in Peace Lilies
3. Too Much Sunlight
4. Too Little Sunlight
5. Overwatering
6. Under-Watering
7. Pests & Diseases
8. Nutrient Deficiencies
9. Soil Quality and pH Balance
10. Conclusion
11. Resources & Further Reading

Why Do Indoor Lilies Turn Brown?

Indoor lilies are beautiful houseplants and can add a touch of elegance to any home or office space – that is, until the leaves start turning brown! If your indoor lily is exhibiting brown leaves, you may be wondering what could be causing it and how to prevent it from happening again in the future. In this article, we’ll explore the potential causes for brown leaves in peace lilies, as well as how to care for peace lilies to avoid this issue in the future.

Causes of Brown Leaves in Peace Lilies

Peace lilies are generally easy to care for and don’t require a lot of maintenance; however, they can still suffer from problems like brown leaves if not cared for properly. Common causes of brown leaves in peace lilies can include too much or too little sunlight, overwatering or under-watering, pests or diseases, nutrient deficiencies, and soil quality & pH balance issues. Let’s take a closer look at each one:

Too Much Sunlight

Peace lilies prefer medium, indirect sunlight; however, too much direct sunlight can cause their leaves to develop yellow or brown patches around the edges due to scorching from the sun’s rays. If you notice this happening, try moving your peace lily away from direct sunlight and into an area with no more than a few hours of indirect sun per day.

Too Little Sunlight

On the other hand, not providing enough sunlight can also lead to yellowing or browning of peace lily leaves due to lack of light energy needed for photosynthesis (the process by which plants create their own food). Try providing your peace lily with a few hours of indirect sunlight per day if you notice its leaves turning yellow or brown around the edges due to insufficient light exposure.


Peace lilies don’t need a lot of water – just enough to keep their soil slightly moist – and overwatering can lead to rotting roots which then causes the plant’s leaves to turn yellow or brown around the edges due to lack of oxygen supply from the roots. To prevent overwatering, allow your plant’s soil to dry out slightly before watering again – usually about once every 7-10 days depending on your environment’s humidity level and temperature – and always check that no water is pooling at the bottom of your pot before watering again as this can lead to root rot if left unchecked over time.


Under-watering can also cause yellowing or browning of peace lily leaves due to lack of water supply needed for photosynthesis and other metabolic processes within plants cells like respiration and transpiration (the process by which plants release moisture into the atmosphere). To prevent under-watering, ensure that your peace lily is receiving enough water on a regular basis – again about once every 7-10 days depending on your environment’s humidity level and temperature – by checking its soil moisture levels with your finger before adding more water if needed.

Pests & Diseases

Various pests like aphids, mites, scale insects etc., as well as fungal diseases like powdery mildew or rust can all cause yellow/brown patches on peace lily leaves if left unchecked over time; hence it is important to inspect your plant regularly for any signs of infestation or disease so that these can be addressed quickly if found early on before they become too severe an issue later down the line..

Nutrient Deficiencies

Peace lilies usually don’t require much fertilization; however, lack of certain essential nutrients like nitrogen or phosphorus can still cause yellow/brown patches on their leaves over time due to insufficient nutrient supply within plants cells needed for photosynthesis as well as other metabolic processes like respiration and transpiration mentioned earlier.. To avoid nutrient deficiencies in peace lilies you should use a balanced fertilizer every few months during their growing season (spring & summer) but take care not to overfertilize them as this can also lead to nutrient toxicity issues later down the line..

Soil Quality & pH Balance

If you haven’t repotted your peace lily recently then its soil may have become depleted over time leading to poor quality soil which then prevents essential nutrients from being absorbed by its roots causing yellow/brown patches on its leaves due low nutrient supply within cells.. In addition poor quality soil may also lead imbalances in pH levels which further affects nutrient absorption leading again yellow/brown patches on its leaves.. To ensure optimal soil quality & pH balance you should repot your peace lily every 2 years using fresh potting mix made specifically for indoor plants such as those containing peat moss & perlite mix..



In conclusion there are various reasons why indoor lilies turn brown; however some common ones include too much/little sun exposure; overwatering/underwatering; pests & diseases; nutrient deficiencies; and poor soil quality & pH balance.. By understanding these different factors you should now be better equipped at identifying what may be causing the issue with your own indoor lily so that you can take corrective action accordingly.. Finally remember that prevention is always better than cure so try adopting good practices when caring for your indoor plants such as providing them with adequate light exposure & water according regular intervals while monitoring their soil moisture levels regularly along with periodic repotting using fresh potting mix every couple years..

Resources & Further Reading

• How To Care For A Peace Lily: https://www.gardeningknowhow.com/houseplants/peace-lily/peace-lily-care-growing-peace-lillies-indoors.htm
• How To Identify And Treat Peace Lily Pests: https://www.gardeningknowhow.com/houseplants/peace-lily/peace-lilly-pest-controls .htm
• What Is The Difference Between Fertilizing And Repotting A Plant? : https://www .gardeningknowhow .com /special /organic /the -difference -between -fertilizing -and -repotting -a -plant .htm

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