Hi there I'm from Toronto Ontario Canada and I'm fairly new to bonsai this is my first winter with this maple tree I currently brought it inside after it dropped all its leaves. I currently have it under a grow light with some of my indoor trees. My idea is to put it in my unheated shed six to eight weeks before winter is over and we're going into spring? I'm wondering how long is the dormancy period For this type of tree? My tree is in healthy condition at the moment it doesn't seem right to have it sit outside in the shed for 3 months please advise me if I'm doing the right thing.