Stem rot is a fatal problem for your ZZ plants. In addition, there will be a foul smell near the soil surface. If the stem near the soil is slimy or mushy with dark spots then, you can be sure of stem rot. ![]() Control Measureįirst of all, you need to check the plant for fungal symptoms. Because without timely treatment the plant will gradually die. It’s really important to fix the stem rot as soon as possible. In stem rot, the ZZ plant stem shows dark spots, especially near the soil surface. It occurs if the stem is constantly wet or in waterlogged condition. Stem rot is caused by a soil-borne fungus. If you have kept your ZZ plants in low light but still there are black spots on the stem then it’s a fungal disease. The next thing to check is whether your plant has stem rot. You can use a moisture meter to know how much water your ZZ plant need ( Our pick: Atree Soil Soil Tester Kits with Moisture, Light, and PH Test for Garden). It’s hard to tell how much to water the ZZ plants because it depends greatly on soil condition, pot size, and weather conditions. Otherwise, fungal problems like root rot and stem rot will occur Make enough drainage holes on the pot so that excess water can drain easily from the pot. If you overwater them the stems will get dark spots and the leaves will be turning yellow and wilt. For this, you can place them a few feet away from the window so that they are not directly exposed. Since they are a bit sensitive to sunlight, it’s better to give them indirect light. Otherwise, their leaves will turn yellow and brown and fall off from the plant. In this case, the dark spots on the ZZ plant stem will take a very long time to disappear but your plant will not get new spots anymore.īut here is the catch, You also have to make sure the ZZ plants get at least 4 hours of sunlight everyday. If you have figured out the black dots on your ZZ plant stem are because of bright sunlight then immediately move them to another place where the light is low. So, whenever you see your ZZ plant has black spots on the stem the first thing you need to check is the amount of sunlight they are getting. So, If you let your ZZ plant in scorching bright sunlight then it will develop black spots on the stems. They need very little sunlight to be naturally beautiful. There are a lot of plants that like plenty of sunlight. ![]() So let’s get started- What Causes Black & Dark Spots On ZZ Plant Stems Because this article has got you covered with all the do’s and don’ts so that you can treat them efficiently. ![]() Too much sunlight, Overwatering, Root rot, Stem root, and Leaf spots are the 5 reasons that can cause dark or black spots on your ZZ plant stem.ĭon’t worry! Solving this issue is not going to be very hard for you. So why are the ZZ plants having black spots on their stem? But, to fix this problem you have to know what is causing the spots and how you can solve it. If you don’t start treating these spots immediately the plant can become very weak and even it can die. But sometimes some conditions make black spots on their stem that are very hard to get rid of. ZZ plants are very much welcomed as a houseplant because they are very easily maintained. Your ZZ plant is developing black spots on its stem and that doesn’t seem to stop?
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