The inability to get water throughout the system can cause browning throughout the mint leaves. It can be difficult to guess what problem is causing the browning in your mint plant. Clay tends to hold quite a bit of moisture. Tap water can be detrimental to a sensitive plant such as variations of mint. Underwatering deprives the mint of getting enough moisture to properly supply life to itself. Basic requirements Mint is a rapidly growing plant which is very easy to grow. Maintain this temperature at all times to prevent the plant from dying unexpectedly. Counteract this by splitting the bushel into as many smaller pieces as you can and placing them into smaller pots! The diseased area turns dark brown, and is quite dry. If the spots are due to insects, then it is safe to eat spotted mint leaves as long as they are thoroughly washed before consumption. Keeping a plant in a moderately humid environment is extremely important. Source: Plantvillage; Penn State University. The best way to get rid of pests is to change the environment of the plant. Smooth over the bumps in the road and keep riding on your way to plant paradise! Because mint spreads quickly, you may find an entire bushel in one planters pot. Water and nutrient flow is thus inhibited because tâ¦ My nameâs Arifur and I am an Agriculturist. To best preserve the flavor and strength of your mint leaves once picked, wrap them in a slightly damp paper towel and then place them in a sealable bag or another airtight container. You can stick your finger 1-2 inches in the soil to check for moisture. Welcome to my website where I write about growing your own organic food in a limited space. The tissues and cells that create the structure of what a plant is, holds water to supply the plant with nutrients. So it is important to know how deep do mint roots go? This will end the browning from cold shock and keep your mint healthy. Houseplants cannot stand drafts because it imitates winter-like conditions in which plants begin to preserve themselves. The best way to fix this issue is to supply good fertilizer or create compost. They are small arachnids that can cause leaves to turn yellow and fall off the plant. They feed on leaves and create brown spots that create foliage on the stem. It is also like a weed, so don't feed it, that can kill it. The watering schedule depends on the climate and the humidity of your area. It could also happen if the plant has outgrown its container. So, when you over-fertilize, you run the risk of fertilizer burn. In an effort to give your plant extra nutrients, you may have done the counter effect and damaged your mint instead. Mint does best in soil that’s moist but not completely drenched. If you’re growing the mint in a pot, you can just move it in a shaded location. Try getting a misting bottle and turning it to the âfine mistâ setting. 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