> SO if you want to maintain drainage and > save weight you must use a material of > the same particle size - but lighter. > Perhaps the Styrofoam beads used in > "bean bag" chairs would work better > than Ghost Farts. For capillary action to function the medium must be capable of being wetted. Foam repels water and there would be no capillary action, so these small foam beads would not provide better drainage. I do this to make containers lighter for the inevitable moving around. And as for the cycad seedlings - they didn't take P chem, and they are very definitely much less rot-prone in deep containers with a layer of foam peanuts under then soil as opposed to without the peanuts. Leo Martin