The higher amount of sunlight will make the soil dry out quicker and maybe you will have some roots still intact and able to continue providing nutrition. Try and place the plant in a sunnier area to hopefully save it from all the water in the soil. When the roots are rotting the most common sight above the soil would be those black spots on both the stem and the leaves. Yellowing leaves is also something that will happen. Without any nutrition being passed onto the rest of the plant then you will see black spots appearing. If the roots are starting to rot, then they can’t drain any nutrition from the soil. That will eventually make them drown and after that rot. The high level of water present in the soil makes the roots unable to take up any oxygen. This just causes a lot of issues with the plant and makes it less likely to grow great. With better resistance and fewer demands.As we mentioned in the first part of this article already, the ZZ plant will not grow very well if the soil is significantly overrated. If you purchased a new plant and it was potted a bit too deep where it was grown, the lowermost leaves that are partially buried would also dry up and turn brown. The dried sheaths down at soil level are also quite normal. The irregular black splotches on ZZ's stems are normal. When it starts to grow a stem, you should help it grow the stem by watering it a little more often. If your ZZ plant is not growing a new stem with leaves, you can skip on watering your ZZ plant for 2 months without a problem. The ZZ plant thrives when you forget to water it for weeks, sometimes months. What might be causing these black spots on my ZZ plant plantclinic Help with my ZZ plant - dark spots on stem. The ZZ plant is hardy, tolerates little light, and most come from semi-desert or arid regions. The ZZ plant doesn't require too much water, either.Īnswer (1 of 2): No it isn't normal, especially if the spots are softer than surrounding tissue, which indicates disease or side effects of root rot. Also, it might attract more issues to the plant. The plant will struggle to do well if there is too much humidity in the room. While moving the plant to this type of place, ensure there is not much humidity in the room. Anaerobic means without oxygen and that's what happens when soil is wet too long - there isn't enough air in it to feed the cells. Rot is caused by anaerobic fungi and bacteria. Overwatering - which actually means that the soil stays wet too long - leads to root rot. 3.ĭark spots on the stems of the new zz growth Should I be concernedĪnswer (1 of 4): Most likely. Choose a clean pot with drainage holes and use fresh soil to repot the plant. Tip the plant out of the pot and get rid of the soil. For more severely affected plants with larger black spots on their stems it is best to repot them. Stem rot happens when the stem of a plant is constantly wet, either. Both these problems are caused by fungi which are encouraged by bad watering practices. If the black spots on the stem of your ZZ plant are right at the base of the stem where it meets the potting mix or if they are slimy or mushy, they could be a sign of stem or root rot.
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