generous 40cm (16in) Diameterstops Weeds Growing Around The Treekeeps Soil Warm Around The Tree Rootsno Need To Trim Grass Around Vulnerable Stem take Advantage Of These Natural-look Mats, Perfect For Fitting Around The Base Of Tree Trunk Of Recently-planted Trees. The Mats Act As A Warming Weed-barrier, Excellent For New Root Growth. The Roots Respond Better In Warmer Soil & Are Unimpeded By Nearby Weeds Robbing The Tree Roots Of Water & Nutrients.the Mats Let You Mow The Lawn & Trim Nearby Without Getting Too Close To The Vulnerable Bark Of Young & Newly Planted Trees. The Cocoa Mats Allow Air, Water & Nutrients To Penetrate Through To The Tree Roots & The Mats Simultaneously Keep Weeds From Growing So Your Prize Tree Gets All The Nutrients & Water For Optimum Growth.you Can Re-use Your Mats On Other Trees & Cut To Shape If You Need To. Alternatively Place Them On The Compost Heap Where They Will Decompose Fully & Provide An Effective Carbon-rich Material To Keep Your Heap Well Balanced With A Healthy Nitrogen To Carbon Ratio.useful Tipposition Your 40cm (16in) Diameter Mats Around Newly-planted Trees After You Have Given Your Trees An Initial Generous Water & Feed. Your Mats Will Secure Firmly In Place By Piercing Some Pegs Around The Edge Of Your Mat.