thought I d try to see if I could make this work.. took some fern fronds and laid them on some plastic then took some quick crete that I had sifted all the gravel out of.. mixed it up and carefully patted it over the fronds.. did a thin layer then added some hardware cloth to reinforce it then added another layer and a hanging hook .. covered it and then let it dry for about a week keeping it moist to help it cure.. I then carefully turned it over and found my impression had worked!! whoo hoo!!! I let it damp cure for about 30 days. after letting it dry real good then I painted it with outdoor acrillic paint.. not a bad for less than a dollars worth of material and some time
