We have seen uneven ripening on grapes this year with some berries remaining green while the majority of the cluster being fully ripe. Concord grapes tend to have this problem in most years but other varieties are being affected this year. This is likely due to the excessive heat we have experienced this summer.
Once harvested, grapes can be stored for up to eight weeks if kept at 32 degrees with 85 percent relative humidity. Other attractive options are available as well including making juice, jellies, jams and wine. (Ward Upham)