Two Letters Re: Advice on Sawdust and Other Barn Waste as Fertilizers
Jim: Something to very careful with when composting sawdust is to be absolutely sure you do not have any sawdust from pressure treated wood. There is a myriad of nasty chemicals in this wood that will destroy your compost heap. Sawdust should not be added directly to your garden because it absorbs and holds moisture and other nutrients. Wood ashes are fine, but only add 1 or 2% Phosphorus and 3 to 7% of potassium. Wood Ashes have an alkaline effect on your soil. I put eggs shells and coffee grounds and wood ashes directly into the garden all winter …