I am a fairly new gardener, Ive had a few gardens here and there but with the purchase of our new home now I plan to get serious. I have started a few seedlings of tomatoes and peppers and have noticed a fine mold over the top. How does this happen and what can I do to fix this? I have them in a small indoor greenhouse with a light suspended above them. Was thinking it may need some air flow. Thought Id get some answers first.