Grapevines are commonly grown to cover a trellis, walkway or fence. You can easily multiply the number of grape vines in your yard by taking hardwood cuttings from your established plants. Hardwood cuttings are typically taken in the fall or early winter months. A typical cutting is about four to six buds long, and is usually taken from the middle of a vine cane rather than the very tip. New cuttings taken from old vines must be rooted before they can become new plants.
Place your grapevine cutting in a glass of water so that the buds on the vine point upward. Let the cutting soak for 24 hours.
Put an equal portion of peat moss, potting soil and sand in a 4-inch pot. Mix half-diluted, 16-16-16 fertilizer into the soil.
Poke a hole in the center of your pot with your finger. Place the cutting with the buds pointing upward into he hole. Put the cutting deep enough that only one or two buds are outside of the soil. Press the soil firmly around the cutting so that one of the buds is just above the soil surface.
Give your cutting just enough water to dampen the soil. Continue to dampen the soil each day by misting water over the soil and plant each day with a spray bottle.
Place a plastic bag over your cutting to increase the humidity. Place it in a location where the temperature will remain between 65 to 70 Fahrenheit degrees with indirect sunlight.
Check to see if your vine has rooted after two weeks by poking your finger gently in the soil near the base of your plant. Check your plant every two weeks to confirm rooting. Remove the plastic bag once the vine forms roots. Keep your vine indoors for one year before planting it in its permanent location.