The sidewalls on the high tunnel are automatic and lift up from the ground to close. Sometimes there is a gap at the top of the sidewall where cold wind can blow in. Randy had the idea of putting a sheet of some material on the top so it would block the gap. We decided on plastic. Shelia, Randy and Jeremy put the plastic strips up today. We are going to see if this helps. … [Read more...] about Shoring up the high tunnel for late winter vegetables