The first thing you would need to do is sterilize it. This can be done by baking it in an oven, steaming it or microwaving it. Then you can add any amendments or additions to the mix.

Really easier to start with fresh stuff and I question if saving so little money is it worth it.
oldmac Reviewed by oldmac on . Reusing Potting mixes I have not seen this question asked before and I would like some input by other growers. Can potting soils be used over again? If yes what would you have to do to the "soil" to make it viable again. Thanks all. Rating: 5