Grapes are easily propagated from seed. This is useful when breeding new hybrids or propagating heritage plants. Hybrid grape plants will not produce true to seed and are usually propagated by cuttings. Plants grown from seed will not be genetically the same as the parents and may not have the desirable characteristics of the parents. This is not a problem with heritage seeds. Grapes should be planted in the early spring to allow time for the plant to become established during the first summer. Readying the seed for planting begins during the previous year’s harvest.
Collect seeds from mature grapes that have ripened on the plant. Extract the seeds from the grape.
Separate viable seed by dropping the seed into a glass of water. Dead seeds will float and can be removed. Seeds that sink should be cleaned and dried.
Store seeds in the freezer at 0 degrees F. Grape seeds require prolonged cold storage to germinate well. Remove the seeds from the freezer in December or January, three months prior to planting.
Place the seeds on a piece of filter paper or paper towel that has been moistened with a diluted fungicide solution. Place in the refrigerator at 40 degrees F until planting time.
Plant the seeds in the early spring. Plant seeds in small pots and place in the greenhouse until the last danger of frost has passed. Move to a cold frame until the weather warms.
Transplant into the ground in June when the ground has warmed. Choose a location with loamy or sandy loam soils and good drainage. Water whenever the weather is dry during the first year.