Extend the growing season and keep your shovel in the soil this winter. Mild winters aren't a problem for our polytunnel greenhouse. When winter frost brings its wavering temperatures, ensure your plants are protected. Enjoy fresh vegetables, onions, salads, and home-grown tomatoes year-round. Easy to access and ventilate with roll-up doors and windows, heat, UV, and humidity is in your hands. Exercise your green thumb. The translucent PE cover offers UV protection to keep plants safe from harsh sunlight. Roll-up doors and windows for better cross ventilation and to control temperature and humidity. Arched roof to prevent water from accumulating. Powder-coated steel pipe is water-safe and bend resistant. 10cm Overlang cover design makes the greenhouse more stable and secure. Convenient to assemble by the three-corner and four-corner joints. Material: Steel, PE. Dakota Fields