That’s possible, but I think age could be an important factor as well. My Shanxi Li has been 5 feet from Li and Sugar Cane/Bok Jo/Tae Sang Wang (and within 15 feet from another 4-5) for a while , but it hasn’t been productive so far. Though there was initial fruit formation on it 2 years ago that dropped off.
I think the major factors are (but have no idea which is most important):
4.) Pollination (though I don’t think this has been an issue for me, given how many types I have)
I’ve been very attentive this year in terms of fertilizer. Maybe each month. In past years, I’d do it maybe once or twice a year. I also added GA3 into the mix, though there was initial fruit on the Shanxi before that (maybe it also helps avoid drop?).
I suspect that all you need is one thing to not be good (bad weather? poor soil? too young for heavy crop?) and you don’t get much. A bit frustrating, but once I can get them consistently fruiting (knock on wood), maybe I can take away one thing (ie fertilizer or GA) from one or two trees and see which are the most important.
Did it say why to avoid the fruit? Hopefully it doesn’t cause it to drop…I think high concentrations can cause fruit drop, but I didn’t think that was a problem at 10-20ppm. Of the ones I sprayed, some had small/tiny fruit, like the Shanxi. Others, like Sherwood, only had flowers (a week later, it now has a handful of small fruit).
Me too- it would have been great to start getting fruit-set back in June. I’m a bit concerned with how long it will take the newly set fruit to ripen. I suspect that it will be well into October, so hopefully we have a warm autumn.