Any thoughts on cherilata (Annona cherimola x Annona reticulata) seedlings as an ideal rootstock? Perhaps there is a synergy between the cold hardiness of cherimoya and the vigor of reticulata? The seeds of cherilata germinate readily and become seedlings pretty quick. Certainly worth evaluating. Just finished eating a cherilata - raspberry delicious- not too many seeds, firm, and unlike sugar apple, the late crop is just as good as the early crop.