breaking dormancy - effect of rootstock (persimmon)
A couple years ago I planted 4 persimmon seeds (D. virginiana) where I wanted a persimmon tree. One of them is now leafing out, while the others appear completely dormant. They are within a 2 or 3 foot circle, so I doubt microclimate is the reason, and am guessing that it's just genetic variation. I'm now wondering, if I graft the same variety on all of them, would the rootstock influence when the grafted portion breaks dormancy? In other words, would the graft on the early growing rootstock also start growing earlier than a graft on one of the later growing seedlings?
This could have important consequences for those of us growing Asian persimmons where late frosts can be a problem, especially in a year like this. My Tam Kam is starting to leaf out, but the last frost date is a month away.
I'll graft at least a couple of them and see next year if there is any difference, but I am curious if anyone has insight on this.