Oh, one thing about rooting mulberries...
although the cuttings will look happy for over 2 months and push out new growth (over 6 inch of green wood and fully formed leaves)...this doesn't mean they're rooted yet!
I've had cuttings that I swore, had to be rooted, because of how much they grew!
When it came time to repot, the roots were barely formed!
White mulberry takes long time to root for us, and we put them in 10 gal pots, about 10 cuttings per pot, no hormone, in deep shade, watered daily during the warm season.
About 40% survive.