Has anyone had any success grafting the asian pear varietals onto hawthorne or mountain ash? A friend just did some pruning in his orchard and set aside a bunch of scion wood for me to play with (just got an omega grafting tool for Christmas ) and I was wondering if anyone out here has tried this combo with any success. If you have any pointers or advise fire away, I'm always interested to hear differing opinions. Any way I'll post some pics up as I start the fun!!!
I tried making a pear-centric Belgian fence using Shipova (purchased, because they take forever to start to fruit as it is) and hawthorn x mountain ash and aronia x mountain ash hybrids (both of which look like red-purple fruited mountain ash, but are smaller trees with supposedly better fruit) as foliage contrasts/accents. I budded the Sorbus hybrids (other than Shipova) into OHxF333 European pear rootstock. The buds "took" but growth was minimal (6") vs. several feet of growth from pears budded on the opposite side of the "Y" and after 1 year, died. (I was doing a symmetry thing and trying to maximize the variety, each cordon different and mostly pears.) Perhaps they simply couldn't compete with pear branches and would have worked if they each were the only scion on a pear root, but I am inclined to think that Mountain Ash doesn't do well on (European) pear roots. If graft compatibility is reciprocal (no idea as I don't have Sorbus trees to test on, but seems reasonable), I suspect pear on Sorbus will struggle.