my grafting to precosious rootstock was not neccesarely ment to make it produce sooner. But just to make it less unproductive.
Whith sweet cherry’s there seems to be a production difference between rootstocks of the same size. I remember a document (the greg lang document?) mentioning that certain varieties that are hard to get producing should be planted on the more productive gisela 5 for example. And the self fertile often overproducing varieties would match Krymsk 6 better, since you’d need to thin less. (krymsk 6 is suppposed to be less productive/precosious than gisela 5. but roughly same size)
@mamuang
Do you remember the Danube having few flowers? or did it have plenty of flowers, just little cherry’s. Do you think it was a flower bud production problem? a flower pollination problem? or maybe both?