I am shopping around for some rough cut cedar or hemlock right now for the raised garden beds....and maybe a chicken coop. I have pinged two lumber yards through their kijiji ads but I have yet to get a response. Later this week I will give another local yard a call. I am thinking 2x6" or 4x6" lumber if the price is similar. Would 4x6" be overkill for raised beds? The beds will be 8x4x2' in size.