Hi. I have a plant that is growing mold ? I changed the soil a few different times and washed thr roots. Still mold comes back. Now i have a a new addition to mz plants ans thats soil is growing mold too. I dont water too often. I dont know what the problem is. Help?

If it's not an issue with the soil staying too wet, it may be the soil itself ... you may have purchased a bad bag of soil that contained mold spores.

Does the plant get sun and good air flow?

I would spread the moldy soil raked on the lawn and let sunlight and microbes cure the problem. Nature knows how to deal with that kind of problem.

To make sure you aren't using contaminated potting mix, mix together 4 parts of plain peat moss and one part of Perlite and use that as your potting mix.

It would help if you posted a photo so we could see what kind of plant you have and how it is potted.