Hello Luca. Some terms your using i don’t understand. i can gues, but to be sure what do the following words mean?
bionts?
ready gem?
latent gem?
I also grafted and than rooted some grapes last year. I unfortunatly don’t have any offical rootstock. So used spare wood of isabella for the rootstock. And grafted bought scions ontop. I bought the scions, and they only had 2 buds. So i cut 1 bud off, grafted it as backup for if the scion would not root. In the end the rooted scions where quite weak and i think 1 even died. The grafted ones took off though.
I used whipe and tongue graft. And then put them in a box with slightly damp cocopeat at 18-19 celcius (room temp)
I also had a rooted cutting, make so much callus. It actually split the scion like a banana.
