I'm starting a new edible garden, and have planted three grape plants around a vinyl arbour (please see picture below.) Question 1: Are the distances I've planted them alright? They're about a foot from the arbour. On the side with 2 plants, they are about 3 feet apart. Question 2: How deep should I have dug the hole for the plants? Question 3: I read somewhere that I can put soil above the soil line on the stem to encourage roots to rise to the top? Question 4: Do I need to do any pruning now, and if so, how do I do it? The varieties of grapes are: Himrod and Interlaken on the same side, and Suffolk on the other side.