Checked out all the grapes today. The Sangiovese is at 20 Brix (although at least one berry tested higher a few days ago) and a pH of 3.51 (pH squared times sugar equals 246). I'd like to get the sugar up to 22 Brix at least, ideally 23. So, will wait. The Cabernet is at 22.5 Brix, with a pH of 3.61 (293), again, getting close, but I'd like at least another degree of sugar. I think harvest is likely to be right around the end of the month.
The neighbor's Zinfandel vines that I'm tending this year with the help of our (other) new neighbor, Steve, are at 21.0 Brix and a pH of 3.41 (244), still too early to pick in an ideal world, but, as we all know, the world is not ideal. The problem is that the grapes are fast disappearing to the raccoons, as Ben, the owner of the grapes, didn't want to bother netting them. Looks like we'll be forced to harvest these earliest of the three varieties, probably on Steve's next day off, Thursday.