Older plants will produce more vigorously after the first season, but they also cost more. Grapes are deep-rooted. Soil preparation ensures success. Grapes, although fairly tolerant of soil types and pH, do best in a pH of 5.5 to 6.5. Sun and exposure are important factors in site consideration.
Full sun is critical for healthy vines and fruit sweetness.
Never locate vines in a frost pocket. Freezing temperatures in spring can damage or destroy flower clusters. Unusually cold spring weather will reduce pollination and prevent grape formation. Eliminate perennial weeds from the site through cultural techniques or using non-residual herbicides. Test the soil and add recommended amendments the fall before planting if possible.