It may be awhile before you can find these special grape vines available for home gardens, but they aren’t any more difficult to grow than other grape varieties. They need bright sunlight and good air circulation. Adjust the soil pH to between 5.0 and 6.0 before planting, and try to maintain this pH as long as the grapes remain in the location. Space the plants as much as 8 feet apart if you plan to grow them on a trellis or as little as 4 feet apart if you are going to stake them with poles. Water the plants when the weather is dry until they become established.
You can fertilize grapes with a layer of compost each year if you prefer an organic crop. If you plan to use bagged fertilizer, apply 8 to 12 ounces of 10-10-10 around each plant about a week after planting. Increase the amount to 1 pound the second year and 20 ounces in subsequent years. Keep the fertilizer about a foot from the base of the vine.
It can take a long time to learn to learn to properly prune a witch finger grape vine.Prune the grape vine in late winter or early spring, after the danger of frost has passed but before the vine begins putting on new growth. Remove enough of the stems to allow in plenty of sunshine and air, and to keep the vines from exceeding their boundaries.
This information about witches’ finger grapes will help you establish your vines. Good pruning technique comes with practice and observation.