Muscadine grapes are well adapted to the Piedmont and Coastal Plain of NC, where temperatures rarely fall below 10 degrees F. Muscadines unlike vinifera (bunch) grapes have a high degree of tolerance to pests and diseases. The fruit is very popular to make wine, pies and jellies due to its distinct sweet and fruity aroma. Muscadine Grapes, (Vitis rotundifolia) are often referred to as scuppernongs and are native to the Southeastern United States.
The best time to plant muscadines is in the Spring (March-April) after the chance of hard freezing temperatures. They should be planted at a minimum of 10 feet apart in row and 8 feet apart between rows. This is also dependent upon the trellising and training technique. The ideal trellising system would allow for 10 foot cordons (arms) on each side of the main trunk. A single 9 gauge wire supported 5-6 feet off of the ground allows for easy picking and pruning. Growing muscadines over a garden arch or a pergola can be aesthetically pleasing and provide shade, but the management is difficult and if neglected the fruit production will decline.
Fertility requirements are simple. First, as always recommended is to take a soil sample before planting and then every three years after. Apply 1/2 pound of 10-10-10 in an 18 inch band around each vine after planting in April. The second year apply 1 pound and then as the plant matures apply 1-2 pounds uniformly under the vine in March of each year not to exceed 3 pounds per plant. Grapes have a relatively high magnesium requirement and this can be met by applying Epsom Salts in July by mixing 1 tablespoon per gallon of water and pouring under the vines. Muscsadines are quite drought tolerant, but do benefit the first two years from watering and during dry periods.
Mulching around the plants assist with keeping a weed free area, but try not to pile it up on the base of the vine. Keeping a 2 foot diameter around the vine free of weeds and grass alleviates root competition with the vine. You may experience problems with japanese beetles and black rot, but muscadines are pretty forgiving. Birds may be your biggest challenge. You can use bird netting or place fake owls near your vines.
