Hey ive noticed in the uk a lot of the garden centers these days Sell compost with extra added nutrients not good for marijuana.......so i went to Wickes and Found 25 litre bags of TOPSOIL 5 for £13 But its Steralized soil garunteed no Added Nutes this means when planting from seed your Plants will only be drinking the Nutes You give it......Top Soil is Common......Just A Tip :>)