In my super-arid climate, I get less than 1% rooting of grape vines when placed directly into the dirt of my irrigated garden.
These days, I root them in buckets of
water. Success rate is about 100% with rooting hormones, and about 50% without. As soon as
roots start forming, I move them into pots, and then into the garden.
Here's what some my grape cuttings looked like this morning. I have a few more varieties to cut in the next few weeks.