Zapotec fruit set

[Jonathan_E]

Hi all,

I have around forty varieties of tomatoes growing this year, and every one of them has set fruit EXCEPT for Zapotec. A picture of where it should be is attached. The plant is big and healthy, and right in the middle of a patch of garden (I have to grow things in little patches because my backyard is mostly a granite knoll with bits of soil here and there) surrounded by other plants that have set fruit. Has anyone had a similar experience? Any idea what's going on?

thanks,

Jonathan