This Tomato Gro-Zone is strong, durable, easy to access and offers great ventilation. The PE cover is extra-strong, as are the frames which are made from robust powder-coated steel, while the zip-up front allows you to roll it all the way up for total access. When the front is rolled down it still allows for good ventilation thanks to the four vent holes in the sides, while three upper vent holes enable the growing canes to pass through. Featuring top quality fixings like webbing ties and hook/loop cover fixings, it's a great quality investment and fits standard size grow bags and trays. Features and Benefits Maximum strength - The Gro-Zone features an extra-high density 150gsm reinforced PE cover, and frame shelves which are made from durable powder-coated steel. Easy to access - The front zip-up panel fully opens and easily clips back, allowing complete access. Good ventilation - Thanks to four vent holes in the sides to improve the air flow. Three upper vent holes - These allow the