Goddess T's Inner Sanctum

I used to teach fruit tree grafting for Extension. The important thing to know about it is that you have to give the graft nutrition or it will die, and you do that by attaching it properly to the rootstock plant's vascular system. Woody plants go bark -> phloem (food transport) -> cambium (growing layer) -> xylem (woody layers). The cambium is the nice green layer under the bark and is a good visual signal for what you need to connect the grafts to so that they get nutrition from the phloem and can grow together as their cambiums repair the cuts. You can see that in all the grafting techniques shown. You have to match up at least one side of the graft so it's cambium to cambium and make sure those stay in contact, otherwise the graft will die.