Mint Leaves Turning White: The Top Reasons

by | Oct 14, 2021 | Care | 0 comments

Mint leaves are often used to make refreshing herbal teas and toothpaste. It’s easy to grow in the home herb garden, but there is one thing that can cause major problems: white leaves! This article will provide information about why your mint leaves turn white and what you can do about it…

Why Are My Mint Leaves Turning White?

Mint leaves turn white when powdery mildew takes control. This is a fungus that can be difficult to control and it often spreads quickly. It looks like a white, fuzzy substance on the leaves and stems.

It typically occurs when the leaves are wet for extended periods of time. It also happens when there isn’t enough airflow or sunlight, so make sure you take these factors into consideration!

In fact, it is likely that other plants in the area are affected too. You see, powdery mildew doesn’t just affect mint. The good news is that there are many natural remedies you can try to get rid of it in no time!

How to Save Mint Leaves From Powdery Mildew?

Luckily, there are a few things you can try to save your mint leaves from powdery mildew.

To start, clean the affected leaves by gently scrubbing them with a toothbrush and warm water in order to remove any dirt or dust particles. Then apply neem oil using an old makeup brush. It is organic and will keep the fungus at bay!

I think all gardeners need a bottle or two of neem oil as it’s so useful for treating all kinds of fungal issues and pest infestations.

You can also try spraying your mint with garlic water to prevent powdery mildew from growing on the leaves again in the future. Simply mix one crushed clove of garlic, half a teaspoon of mineral oil or castile soap, and two cups of water together. Shake well and spray on the leaves!

Other Reasons for White Mint Leaves

Powdery mildew is the most likely reason for white leaves, but there are other possibilities, which I will now cover.

1. Pests

Insects, such as spider mites and aphids, can cause white leaves. You should look for small insects on the plant or underneath it if you suspect this is why your mint leaves are turning white.

In order to get rid of them, water the soil well with a strong blast from a hose outside. Then spray neem oil on top of that. This is a natural solution, so you don’t have to worry about the spray killing your plants.

You can also remove them manually by using tweezers or gloves and disposing of them in the bin!

2. Overwatering

Mint is not a plant that likes to be waterlogged, so it’s important not to overwater your mint plants. This can give the leaves a washed-out appearance that makes it look like the plant is turning white.

It’s important to only water when the soil is dry to the touch. It should feel gritty when you stick your finger in it, but not so much that it feels dusty.

It’s also worth investing in a moisture meter, which will let you know when plants need watering. Don’t forget this step if you want healthy mint leaves!

3. Not enough sunlight

Mint is a plant that prefers plenty of light, so if you are growing it indoors or in the shade outside then it may not be receiving enough sunlight. Make sure to place your mint plants in an area where they will receive at least four hours of indirect sun daily.

If this is an issue for outdoor growers, consider moving your mint plant to another location, if possible.

Is Neem Oil Safe To Use On Mint Leaves?

Yes, neem oil is safe to use on mint leaves. It’s an organic product that won’t cause any damage to your plants. This is why I love using it so much!

Neem oil can be mixed with water and then sprayed directly on the leaves of your mint plant. This should stop the spread of powdery mildew, but it will not get rid of existing powder that is already present on the surface.

Is Powdery Mildew On Mint Plants Dangerous?

No, powdery mildew on mint plants is not dangerous. It’s mostly just unsightly and it can be difficult to manage. However, you should always take steps to prevent powdery mildew from forming in the first place!


In conclusion, there are a few reasons why your mint leaves may be turning white. The most common reason is powdery mildew, which can spread quickly and kill off entire plants if it isn’t taken care of immediately!

If you think this might be the problem with your plant, make sure to either use neem oil or spray garlic water directly onto the leaves of your plant. This will kill off any existing powdery mildew and stop it from spreading to new leaves!

Other reasons for white mint leaves include pests, overwatering, or not enough sunlight. Make sure to check if these are the problem before you resort to using neem oil!

Mint can be used in cooking, to repel deer, and in essential oils, but it’s important to keep the plant healthy and disease-free. Follow the tips in the blog post to get your mint plants back on track. Happy gardening!

Hi. I am Aaron, the new owner of PlantCarer! I hope you enjoy the content. Please do message me with any questions or comments you may have.

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