My KB has just finished it's second year in ground here. I received My KB plant also from Gene Hosey. It was kept in a 5 gallon pot it's first summer here. It was at least three feet, when we received it from Gene.
There was no fruit the first summer in the pot. No fruit the second summer either. If memory serves me right, this will be it's third summer here.
Although it was covered with 2 inches of dirt and insulation, It did sustain some winter damage, it's first winter here.
We are primarily interested in locating and testing figs for cold winter areas. As far as I can see, KB does not fit into that category. I hope that as it gets older it will become more cold hardy here. But, because of it's very high taste rating we plan on keeping it.
Gene Hosey, once told me that once I tasted KB, I would feed Hardy Chicago to the pigs. Although ours has not fruited yet, any fig that gets that high a rating from someone like Gene Hosey, who has tasted perhaps hundreds of figs, should be in every serious collectors collection
I'm planning on top working it onto rootstock that is in a warmer spot.
Bob, Zone 5, Connecticut