"Apache" Blackberry Status

To help us better estimate the start of the "picking season", we are documenting the progress of our blackberries from blossom stage to fully ripened stage this year.  Actually have had a few black berries - but not fully "filled out"  yet, and the center is still firm.  With other words, they are not fully ripe yet.  Considering there are about 500 berry bushes, and so far we found about one dozen firm black berries, they are not even close to being ripe.  Here is what the "Apache" berry plants looked like this evening: