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When do Guankou grapes generally ripen?
Guankou grapes have large clusters, large berries, soft texture, thin skin, abundant juice, high sugar content, and a translucent color; the clusters are cone-shaped and the berries are tightly packed. The average cluster weight is 300-400 grams, and the average berry weight is about 8 grams. So, when do the high-quality Guankou grapes ripen? 1. Guankou gra