Wiltshire,
United Kingdom 
When is it time to pick them
On plant
Vitis vinifera
6 Oct, 2010
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Spritzhenry
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Spritzhenry
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Spritzhenry
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Spritzhenry
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Previous question
It depends on the variety and the weather. I would pick a few individual grapes, and if they taste good, harvest the rest. If they taste too sour or "grassy", leave them on a week or two longer.
6 Oct, 2010