Grape Growing Season California

growing grapes in California?
vines not producing grapes in California more than once a season? specifically the flame, ruby, and Thompson?
The grapes grow in the Napa Valley in Northern California or just north anyway. While they usually like the cold, I'm not sure if grapes to produce more than once. Good question though. I hope someone will answer Napa Valley. You control the grapes or wine from Napa Valley and online to see what happens. You can find answers to your questions. It's also good to know the answer when you know just seeing the change of information over time. But you can check the grapes of Napa Valley and specific types of HERE and informative. The producers are experts and they will be happy to know more about their grapes and vineyards. Vintners are people who make wine and you can find some of this. Are you planning competition for them? Or simply curious or an adventure? I'm sure you can find a Napa Valley Vintner can gladly tell you more about their favorite wines and grapes.
John Steinbeck & The Grapes of Wrath