It usually takes about three years before you get a viable crop from young grapevines. We planted grapevines at a house we built in California and the first crop that actually had enough grapes that we could actually pick and eat them was three years later. We ate them as we left town on our way to the East coast and our new home. They were growing strong when we passed by the old house some 10 years later.
A few varieties of grapes produce in two years, such as Brianna and Seyval grapes.
The good news is that grape vines usually live between 50 to 70 years, depending on the variety.
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WHEN WILL MY GRAPES GROW?