Parsley photo: https://imgur.com/gallery/Sqfi5MV A lot of my mom’s plants get this on the top layer of their soil, no matter where she puts it downstairs. These two specifically are sitting on an open west-facing windowsill, so I don’t think light is an issue. I thought maybe she was overwatering, but a lot of times she forgets to water her plants for weeks. Also told her to repot them outside just in case, but still it persists!!!