Soil still good? Brown powder mold on soil?

I am on day 45 for my 3 autoflowers and my water Only grow, and they are needing some nutes because of a cal deficiency, and maybe others. They are doing good, but not great. Around the 30 day mark they started showing deficiencies. I don't remember the brand, but I had a mix of some organic soil, Kellogg's Patio Plus, and perlite. It's been sitting for about 50 days in a sealed tote in my garage and has some brown mold. I read it was ok. Would this be ok to add some diatomaceous earth and then use as a top dressing for my plants?

mold is bad

OK I thought that was on your bud I’m not really sure about mold in dirt some people say it is good others say different I guess it depends on the mold. ‍