The farm used in California is in Sonoma county. The further away from there the harder is to have a good hatch rate. I bough mine in Davis on a Tuesday and picked the freshest Julian Dates. Someone in Santa Barbara got two per dozen to hatch. I got 17 out of 24 eggs to hatch.Oh, a good hour and a half away -- I live in the boonies.
I have heard that the Redding CA trader Joe's does not carry fertile eggs.
Whole foods is an option too