Welp. I’m Going on 3 years with this thread graft on a Siberian elm tree. Here’s the thread for it . I used a seedling from the tree itself but it just doesn’t seem to have taken. I tried to decrease the watering on the seedling in late summer early fall last year, but all of the leaves dried up and fell off. I thought I had killed it, but it flushed through at the end of last year and has pushed growth hard this year. I trimmed back the whole tree but did not cut black the graft. Thread grafts seem so fool proof, but I never claimed to be such. So maybe it could fail even if I continue to wait and wait??