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Buschmeister62
12 years ago

Your grapes need more sun and warmth to make sugar. I would try to extend the heat season. In the spring and in the autumn, a fortified greenhouse should bring the desired effect. Prefabricated films have the same success but do not look very reactive.

Rheinflip
12 years ago

Are you living in the vineyard climate? Did you build sunlight or heat traps in your garden? What vine is with you?

dasmuecke
12 years ago

make them mature longer. otherwise it’s the sort and you can’t do anything