Planning Our Walapini Greenhouse: How We’re Building an Underground Garden System Winter in Tennessee is no joke and a Walapini Greenhouse is perfect for that. Growing up in Bryan-College Station, Texas, I was used to milder winters. Sure, we had the occasional cold snap, but it was nothing compared to the seemingly endless six months of cold and cool weather we have here. Living just five minutes from the Tennessee River has its perks, but the winters? Not so much. Growing crops during those long months is a challenge, to say the least. So, after a lot of digging and…