I’m feeling a little guilt for our conversation so I will post some photos so others don’t get too annoyed.
In my own collection I have yet to see the decline I mentioned previously, but my oldest persimmon trees are only 8 years old. The Pomona article mentioned previously suggested 30 years max. From what others have reported the kaki tree can live for varying amounts of time when grafted to D. virginiania. If I had to guess, the trees I seen expire were approximately 15 years old. For my climate and soil, D. virginiania or a hybrid would be the best rootstock. D. lotus struggles in my soil and tends to get damaged by our neurotic Spring weather. From what I understand D. kaki performs poorly in salty soil, lacks drought tolerance and is too susceptible to cold damage.
This tree is on D. lotus. Notice the rootstock is slightly smaller than the upperstock. This tree has struggled during our droughts, plus it completely lacks vigor.
This is typical of kaki grafted to D. virginiania rootstock. I love this tree.
My local 60 chromosome persimmons outperform the more northern 90 chromosome persimmons. I don’t believe ploidy has any effect on compatibility for persimmons. I think my local trees do better because they are locally adapted to my climate and soil. Here is a big local persimmon, two trunks.
While I was taking the above photos I cut off more of the understock branches.
I obtained my first Kyungsun Bansi graft wood this year. It is supposedly one of the better astringent types, but I’ve heard mixed reports. I may have the spelling wrong.
Also, I wonder what long term effects having all these hybrids will have on the genetics of the local persimmons. Unmatched chromosomes??
Here are some bench grafted interstem tests and various other things…