Maybe grow one of those root grafting seeds just to "test the waters." That'll be a real testament to bill's triple F, N & other graft stock.
You would give good testimony to validity of such claims considering all you have going on. Also, could probably sell grafted specimens for an upcharge price in the neighborhood to cover the cost and meet a few locals.
I'm sure if you contacted the vendor, they would probably mail you a few for free; esp. this time of year.
Heck, I'm curious to see if that root stock specimen can live up to the challenge as well. I also wonder what makes one deter wilt and todes, while others don't of the same species. Probably some biology above my pay grade.
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