I've got a small clearing,was an old logging landing that I think im gonna try to plant something in this spring.Im gonna go in and bushhog it down here in the next few days,and then clean the sticks and roots up in it.But not sure when to spray glysophate to kill everything in it? DO I need to wait until the stuff starts to green up in the spring,or is it ok to spray it now and stop it from ever greening up?