Gardman 3m Polythene Garden Grow Tunnel 08775 This sturdy ready to use polythene cloche will help protect your plants and seedlings and aid growth 3m L x 0.5m W x 0.4m H FREE POSTAGE £16.82 Quantity: at £16.82 each Add To Basket A polythene grow tunnel / cloche which is ideal for early starting your seeds & seedlings, creating a warm & humid environment. The polythene grow tunnel comes pre-assembled & ready to use. The cloche comes with a sturdy wire frame structure & a tough polythene cover. The polythene cloche includes elasticated end closures & ground pegs to help seal the unit from the external elements. The grow tunnel protects against frost & severe weather whilst also warming the soil for earlier spring crops. This makes the polythene cloche ideal for using on the allotment or in your garden. The polythene also gives some protection against plant pests. The approximate dimensions of the polythene cloche are: Length - 3.1m, Width - 0.5m, Height - 0.4m.