white mold in soil of mexican lime tree

Question

I am growing a Mexican lime tree in a pot which I had moved indoors for the winter. I am getting mold on the top of the soil. What could be causing this? I water once a week or when the soil feels dry. Thanks.

Answer 1

This article will help:
https://www.gardeningknowhow.com/houseplants/hpgen/preventing-mold-in-the-soil-of-a-houseplant.htm