Planted between July 10th and 15th so 42 to 47 days in the ground. I don't remember the exact date this particular field was planted.
And yet all the literature says chufas require 90-110 days to produce tubers. Just proves you can't believe everything you read.
Looks like you are making a tremendous crop this year. Most of my fields are producing already too, and a big problem I've got now is that the turkeys are scratching them up long before they reach max production.