Q.ZZ plant is not well
What is happening to my plant? I received this plant as a gift a month ago and have not watered it because I’m afraid to overwater it. But the leaves are still turning yellow and brown.
If the soil has dried out, it is time to water your plant again.
Give it a nice drink and allow the excess water to drain away.
Also if the plant is getting to much light, it may respond with yellowing leaves. Adjust the conditions to filtered light.
Here is a link with more information.
https://www.gardeningknowhow.com/houseplants/zz-plant/caring-for-zz-plant.htm