I don't know if its the weather or the mulch, No BER this year!
I always have BER no matter what I try. I've not had a single case of BER this year, even on my heirlooms!
I mulched heavily with chopped up oak and hickory leaves this year, 10" + deep before it settled to about 2". It was put on in the fall and I just separated it and planted my tomatoes. Then pulled it back around them.
But, before this dry spell hit, I had perfect rain all spring.
Another but.... My neighbor has BER, so I'm thinking the mulch?