What Are Black Spots On Mint Leaves? (3 Possible Causes)

black spots on mint leaves
black spots on mint leaves

Mints or also known as Mentha are often planted by gardeners for several reasons. This includes having a sweet scent in their garden then lightens everyone’s mood. Additionally, the herb also has tons of medicinal properties that make it amazing.

There are about 25 species of the plant that you can choose from and each of them has unique features. With that being said, you should note that mint can be sometimes used in tea to relieve stress or help people with sleep.

What Are Black Spots On Mint Leaves?

Additionally, the herb also helps people in lowering or improving the conditions of their disorders. Going through this, people can understand how amazing mints can be. Though, when it comes to growing the herb, you should note that there are also some issues that you can run into. Recently users have reported that there are black spots on their mint leaves. This is why we will be using this article to provide you with a list of common reasons as well as solutions that can be used for this issue.

  1. Mint Rust On Plants

Mint rust is a common disease that can often spread to these plants. The main issue with this fungus is that it starts weakening the leaves of your herbs. This causes them to lose their medicinal benefits and characteristics. Eventually, as the rust gets worst, the leaves on your plant will start to fall and the mint will then die. Considering this, people must keep a check over their plants at all times.

This helps in identifying if the mints ever catch mint rust. You can usually notice the spots in a yellowish color around summers which will start to turn black as the season progresses. The worst thing about the disease is that it can start spreading from one mint plant to others over time. Though, this only happens when one of the plants has been covered completely.

Hence, people can keep a check on the mints planted in their gardens. This helps them in noticing even if a single one of the plants gets infected. There is no cure for this fungus which is why you should take off the mints that have mint rust on them. This should help in keeping all of your other mints safe from the disease. People can usually use fertilizers mixed with fungicides in advance as well to prevent the rust from ever appearing on their plants.

  1. Black Spot Fungus

Another disease that causes small black spots to form on the leaves of your mint plants is black spot fungus. People usually think that this fungus can only be found on roses, however, that is not the case. The disease can spread on any type of plant which is why it is important to look out for it. You should note that this causes the leaves on your mints to grow weaker until the entire plant dies out.

The disease also spreads quickly which can be quite dangerous. This is why if you notice black spots forming on your mint leaves then you should try washing them with a fungicide that can kill this disease. If done properly, then the effects of black spot fungus should lessen over time and your mints should get treated.

On the other hand, if you notice that the disease is still spreading then you should remove the plant as soon as possible. This is because the leaves might be too infected at the time to prevent the problem.

  1. Heating Problems

While mints require adequate sunlight every day to stay healthy. You should note that high temperatures can also cause the leaves to dry out. The problem can usually be noticed by the black spots forming on the leaves. If you see that these are forming, then observe your mint plant.

If this is coming in direct contact with sunlight, then you should try changing its position. Leaving your plant under partial shade is a great way to ensure that sunlight does not damage it. You should also keep the soil around your mints moist as this also prevents it from drying out. Though, keep in mind that too much liquid can also cause the plant to die.

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