This is interesting!
Groworganic.com will have All-in-one Almond on Viking rootstock this season. If I’m correct, this is the first time that DWN be offering a tree on a commercial rootstock to the home gardener.
Vikinking is a peach x almond x apricot x plum hybrid, or 50% peach, 25% almond, 12.50% apricot, and 12.50% plum.