Hello again - another question :) So we're transforming our small garden space in the front yard into a dwarf JM garden. Yesterday we completed phase one by digging up the plants and grass that was there, tossing in some mulch, etc. We planted one of our trees, an abigail rose, and we noticed that about 8-10" down we ran into clay. How much depth do dwarf JM's need in order to thrive long term? I plan on adding some more mulch but without doing some serious modifications I can only give them maybe 12-14" of clay free soil. *edit* after reading through a bunch of threads it seems to be the consensus that JM's can thrive just fine with clay soils. I live in rainy Seattle so there is lots of wetness to contend with but I've never seen this area get water-logged so that leaves me hopeful. Am I worrying for nothing?