Before planting the Catawba grapes, it is important to choose a location that receives full sun. This grape variety is partial to warm and sunny climates. The soil should be moderately fertile and well-draining. If the soil is too wet, it can cause root rot, so it is important to ensure proper drainage. Once you have selected an appropriate location, it is time to prepare the soil. Clear the area of any weeds and debris, then till the soil to a depth of 12 inches. Add two to three inches of compost or aged manure to the soil to help improve fertility.