what to add to soil to make it hold water
2 smart ways to help your soil hold water. 1. Add organic materials. In sandy soils, organic materials soak up water like a sponge. In clay soils, they aggregate the small particles into larger units with bigger pores, which allow plants easier access to water. smart ways to help your soil hold water. 1. Add organic materials. In sandy soils, organic materials soak up water like a sponge. In clay soils, they aggregate the small particles into larger units with bigger pores, which allow plants easier access to water.