Hello! (: I am new to starting plants from seeds, but have read as much as I can in order to increase chances of success. (: I planted some Yarrow seeds in a black plastic seed tray using a heat mat and grow lights. I used seed starting mix, and then cinnamon on top of the soil as an anti-fungal. They started sprouting in just two days! The problem is, there is white, fuzzy growth in the tiny stems. It looks like fine white hair. I have no mold growing on the soil at all. It is ONLY on the stems of the tiny seedlings. Is this fungus, or just tiny roots? If it is fungus, should I mist them with Hydrogen Peroxide? If so, in what dilution? 1:10 or? Thanks for any help! (: