Doff 247 super fast acting weed killer provides visible results in just hours it is biodegradable and suitable for use in both warm and cool weather the weedkiller is very effective against moss and algae and kills a broad range of weeds including dandelion clover speedwell buttercup and meadow grass supplied as a ready to use formulation in a convenient trigger spray pack for easy application pelergonic acid content 3102 glitre size 1 litre