Thanks for the tips, I'vew been goofing around with these trees for about 5 years now, Mostly Junipers procumbens, and Crape Myrtle.
I bought a chinese elm at home depot, and intend to try an air layer someday. I've also got several cuttings taking root this spring.
I've been using decomposed granite, but only get about 40% usage from the bag. Hoping this stuff will have more usable product per pound.
I found it at
http://www.ewing1.com/general/ews_loc_locations.htm $15 for 50 lbs