If you have never tried propagating a grape vine from a piece of trimming, you will be pleasantly surprised how easy it is. The next time you prune your Oregon wine grape vine, save a few of the pieces that are about the thickness of a pencil to root for new vines.
Cut sections that are about 8 inches long. Remove any leaves that might be present. They should have two or three buds per section and the top should have a 45-degree-angle cut just beyond the first bud. Set them into a bucket of water while you get the plant pot ready.
Mix equal parts of peat moss and sand. The peat moss is to retain moisture while the sand will ensure good drainage. Moisten the mixture with water until the peat moss is no longer dry, mixing it up well to make sure there are no dry pockets. Fill the plant pot with the mixture.
Poke the Oregon wine grape cuttings into the plant pot so that only 1 inch is showing above the surface. Keep the cuttings at least 2 inches apart. Grape vines have a high success rate with rooting, so no rooting hormone is necessary. Make sure you have the cutting right side up by checking that the buds are pointing upwards.
Place the potted cuttings in a partially sunny spot where they will get four to six hours of sun every day and temperatures between 50 and 75 degrees Fahrenheit. Make sure the soil does not dry out but don't let it sit in water either.
Remove the cuttings from the pot after about eight weeks, when they show consistent growth beyond just the first leaf. Place them individually in plant pots filled with regular potting soil. After a year of growth you can plant them early in the spring directly into the ground where they will stay.