If you've ever looked at a seed from a grape you purchased in the supermarket and wondered if you could grow you own grape vine from it, the answer is a qualified "Yes!" The answer is qualified for a couple of reasons. First, not all grape seeds will sprout and grow, and there's no way to tell if a seed will sprout until after you have planted it. The second problem with growing grape vines from seeds is genetic diversification. In other words, just because you plant a seed from a fantastic concord grape that does not mean the vine grown from that seed will produce grapes exactly like the one that produced the seed.
Collect several grape seeds from fresh grapes. Wash the seeds and lay them out on a paper towel.
Dampen a handful of peat moss and wrap the seeds in the damp peat. Place the damp peat with seeds inside a plastic baggie and seal it. Place the baggie in the vegetable crisper of your refrigerator and leave it there for 90 days.
Remove the baggie from your refrigerator after 90 days. Place the still-damp seeds into potting soil in growing pots and cover them with 1/4 inch of soil. Keep them damp but not soggy and place them in a sunny and warm location. The growing pots should be kept at a relatively even temperature (between 70 and 75 degrees F). Do not let them get below 60 degrees F at night. Use a heating pad if necessary to keep the growing pots warm at night.
Be patient. Seeds will begin to germinate within 21 days. Do not expect all seeds to germinate.
Move your seedling to a larger pot filled with potting soil once the sprout is approximately 2 inches high. Do not break the delicate root of the seedling when repotting.
Plant your young grape vines outside in a sunny area with well-drained soil after one year. Keep the soil moist but not soggy.