On gardening Australia I saw Josh Burne in his Permaculture segment had a soil wetting agent that did not destroy soil organisms. Does anyone know what this product is called?
Is it bentonite you're after ? https://www.abc.net.au/gardening/stories/s1305803.htm I think Josh uses it here in WA to hold things in the soil as we have such sandy soil hope this helps Stacm
While bentonite will attract and hold onto water, will it make it available to plants when they need it? Usually clays attract water and hold onto it tighter than the plants. Mike