UW-Extension fruit specialist and UW-Madison horticulture professor Amaya Atucha explains when to harvest grapes and how. First, red grape growers need to watch for veraison — when the grapes start changing from green to red, Atucha says. This is the first indicator that the fruit are starting to ripen and accumulate sugar. When it comes to harvesting the grapes, Atucha says there’s no science to it — just cut the grape clusters off of the vine and refrigerate! She also gives tips on spraying herbicide and pruning the vines.

UW-Extension fruit specialist and UW-Madison horticulture professor Amaya Atucha explains when to harvest grapes and how.&nbsp;First, red grape growers need to watch for veraison &mdash; when the grapes start changing from green to red, Atucha says. This is the first indicator that the fruit are starting to ripen and accumulate sugar. When it comes to harvesting the grapes, Atucha says there&rsquo;s no science to it &mdash; just cut the grape clusters off of the vine and refrigerate! She also gives tips on spraying herbicide and pruning the vines.

Join Pam Jahnke for the latest farm news. Heard daily on WOZN 96.7 FM and 1670 AM in Madison Wisconsin from 5-6am. Also heard on affiliate stations all over Wisconsin.

Join Pam Jahnke for the latest farm news. Heard daily on WOZN 96.7 FM and 1670 AM in Madison Wisconsin from 5-6am. Also heard on affiliate stations all over Wisconsin.

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