What is the white growth found in the seedling soil and is it safe to plant in my garden?

Question: I am a new gardener. I started all my garden plants indoors this year, from seed (about 3-400) and recently, a silvery white fungus or mold is appearing on the soil and spreading to the soil of all my starts. At times it looks like silver threads and other times just a lite silver read more What is the white growth found in the seedling soil and is it safe to plant in my garden?