Zest Large Wooden Cold Frame This cold frame is a low cost means of plant propagation and protection. It will provide seeds with a warm and bright, environment. It will also act as protection from the cold during the winter months. Acrylic glazing is both safe and has excellent light transmission. Ventilation is also important and can easily be adjusted. Pressure treated for durability. Please note - If a delivery is unsuccessful a refusal fee will charged. This cost can vary for each item.