I'm brand new to this but I've smoked a couple things in the last couple of months. I don't have an actual smoker I use my charcoal grill and put chunks on it that way and it works pretty well. My question/problem is I had a maple tree fall down in the yard and I wanna use it. The wood is green but I have it cut to 18' long x 2-3' wide and inch thick chunks. Small enough for the grill but big enough to last. Can I use it green or do I need to wait? And if I have to wait,how long? Thx guys!