All of the Stanislaus tomatoes are grown immediately around Modesto, California with but a single harvest for their entire yearly inventory. I had the honor of being invited to view their tomato harvest and processing a few years ago, it's quite an operation. Between gearing up, for the harvest, processing, and sanitation they then shut down the entire processing facility for maintenance and up-grading which takes about 3-months bringing them right back to the cusp of the next harvest.
Tom Lehmann/The Dough Doctor