Wild Cherry and Wild Plum seeds

I found these with the other seeds.  I collected them in July.  There are also some plum seedlings that germinated earlier.  Might as well see what happens.  First, crack the nuts open, remove the seed.  Then place seed in moist paper towel, in zip lock back, in refrigerator for a couple of months.

Wild Cherry seeds. I tried cracking them open with pliers. Smashed the seeds. This worked, sort of. Then sanded a few for scarification only.

The pliers worked for the plum seeds, if I placed the seed into the open part of the pliers, not the flat part. Vice Grips work better but I don't have them here at home now. I would like a wild cherry, which I would prune aggressively to keep it small. The ones that provided these seeds, have a great flavor. If all of the wild plums grow, I don't know what I'll do with the trees. Something will come up.