I am not sure but I grafted all over the tree and maintain small branches of the following plums: Autumn Gold, Autumn Giant, Autumn Jade, Asian Beauty, Golden Japanese, Burgundy, Emerald Beaut, Dolly and American Plum so far.
It is also planted next to a big Royal Rainier Cherry (95% of the canopy, about 16 ft tall and 12 ft wide) with multigrafted other cherries on it maintained small branches only (5% of canopy). There’s a long bloom overlap with Nadia and my cherries. Nadia’s peak bloom is two weeks early but it lasts long to have nice overlap with my cherries.
I wish to add Summer Treat Pluerry and Candy Heart Pluerry but their patents hasn’t expired. Any other pluerry that I can use whose patents have expired? I have bought Sweet Treat and Candy Heart and they’re planted far from Nadia.