I've had mulberry do that to me a bunch of times, mulberry is real bad at that. On the flip side I have planted a lot of mulberry cuttings to grow my hedge out. I just snip a good sized branch off and stick it in the ground, a year later it's a little tree (stuff grows fast,
). I also planted a lot of wild roses for my wife I find when stave hunting in the woods. I just cut the things off and throw them in my backpack. 6 hours later I shove them in the ground, and off they go. Those things are pretty tough too.