Ideal for vegetables, small fruit, cut flowers and more. A GrowSpan Round Premium High Tunnel will enhance your crop yield, quality and profitability up to 50%.

• Frames are manufactured from our USA-made, triple-galvanized structural steel tubing.
• Available with our 6 mil 4 year Clear Greenhouse Film or our 5.2 oz., 12 mil Clear Greenhouse Covering.
• Our Sun Master® 6 mil 4 year Clear Greenhouse Film is made from strong copolymer resin, with tri-layer construction and UV additives. This film offers 92% light transmission and comes with a 4 year warranty.
• Our PolyMax® 5.2 oz., 12 mil Clear Woven Greenhouse Covering, with added UV inhibitors, is superior to all greenhouse fabrics, offers 85% light transmission and comes with a 4 year warranty.
• Structures 20'W or wider can be designed with Zippered or Roll-Up Doors. Both options are manufactured from 10 oz., 22 mil premium rip-stop translucent fabric.
• Triple-zippered end panels feature our heavy-duty, industrial-strength #15 Zippers and come complete with fabric clips for attaching.
• Four-sided ventilation is easy. Roll-Up Sides feature our exclusive "Twist-of-the-Wrist" Roll-Up Assembly.
• Rafter spacing: 4'.
• Heavy-duty ground posts are included.
• We recommend using a baseboard. Our Recycled Plastic Lumber, sold separately, comes with a 50 year warranty and is ideal.