What would your recommendations be for planting red & black raspberries in the central Ohio area. Also I have read conflicting articles about if they need to be planted away from each other or not. Type of soil each would be recommended.
Whether to plant red and black raspberries together is largely a matter of garden economics. If you can separate them, do so, simply because their growth patterns are different; otherwise, plant them together.
Stick with nursery-purchased plants that are certified disease-free. and red and black raspberries will likely stay healthy for many years, even when planted together.