This page contains the following solutions.
Harvest grapes when they are fully ripe-they will not continue to ripen on the vine. Grape's sugar content rises as much as 20% as they ripen, so a taste-test is the best way to tell if they are fully ripe.
For the past several years we didn't get to enjoy our Scuppernong grapes, except the ones we found as they were beginning to get ripe. Starting in August, before the grapes were fully ripe, the raccoons came at night and had a family reunion in our grapevine.
Even if you don't have a garden space, you can successfully grow grapes in a container on your patio or deck. This is a page about growing grapes in containers.
This is a page about propagating grape vines from cuttings. Grape vines are a good candidate for propagating from either dormant or green cuttings.