Baby Onions in a Greenhouse?
I started some onions from seed February 5. they have all germinated and the seedlings are 2-3" tall. i have them under generic fluorescent bulbs. My indoor growing space is extremely limited and I was hoping to start some pepper seeds soon. So I was wondering when it would be safe to move the onion seedlings into an unheated green house outside? It isn't fancy- its a four shelf greenhouse covered in green plastic that I bought at my local garden center. I can vent it if necessary. I live in the Denver area of Colorado so our temps can go from sub freezing to 70 degrees in the same week! I would also probably bring the seedlings inside or move into the garage at night, especially if there's snow in the forecast. Any advice?