when to graft onto seedlings in the field?
As much as when to graft, I'd really like to understand the why. When is it too early and why? At what stage of growth is it too late and why? I'd particularly like to know about grafting onto seedlings already established in the field. I suppose the answer varies according to species and grafting method. Should I also be looking at the forecast for the coming week when I graft, and if so, what should I be looking for? Are there other factors that determine the best timing? The only grafting method I've ever had any success with (mainly because it's about all I've tried) is whip and tongue, so I'd particularly like to know when to ideally W&T graft persimmons, mulberries, pears, and pawpaws. (It sounds like bark grafting might be preferable with persimmons, but I've had some success with W&T in the past, and I've never bark grafted before, so I figure I might personally have more success with what I have more experience with.) And what happens when trees are grafted in the dormant season? Does any graft union start to heal before buds start to swell in the spring or is everything truly dormant? Is the scion just sitting there waiting until that point? My assumption, which is probably a foolish beginner's assumption, is that I want to see very active spring development on the stock before I graft so that my scion will immediately receive lots of active nourishment from the stock. Is it actually better not to wait that long?