When mint starts growing black spots on its leaves, your plants are likely suffering from leaf blight or advanced stages of mint rust.
41+ Brown Spots On Mint Leaves. Mint is hardy in u.s. My mint is an old variety and on occasion gets brown spots on the leaves, and then those leaves die and fall off.
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If water sits on the leaves it can act as a lens for sunlight, resulting in the. Over the last few days about 25% of the leaves are showing the brown spots. Found some brown spots on the old mint leaves on my new planted cuttings.
I also have two young banana plants, maybe a foot or so tall, and they have brown spots on their leaves too:
Some leaves did as well, but that is natural for them in winter. These are likely symptoms of bacterial leaf spot, which occurs when soil infected with watering from above can also result in brown discoloration of the leaves. Indoor mint leaves with black/brown spots. When mint starts growing black spots on its leaves, your plants are likely suffering from leaf blight or advanced stages of mint rust.
