Matt McSpadden wrote:Any low-lying wet areas? I don't know if it would use all the rocks, but digging down a foot or two and filling it with rocks would make a sort of french drain to let the water go there instead of pooling.
Matt beat me to it! Washed rock is perfect for this.
Placed on the ground without a geotextile, it will just sink in and become a pain in the butt.
Mostly, I would say sell it -- don't give it away either. Know your prices and offer a good deal.
Of course, this is all thermal mass right at your fingertips. I recall a RMH design using gravel. Could be good for a greenhouse heater?