My grower/nursery owner insists that the width of the hole is determined by the geographical area in which you live. He was not happy when I asked him why does every online site and every garden show on tv say that the width of the hole should be 2-3 times wider than the ball or container. He planted all of the shrubs and trees in my yard into holes the exact size size of the balls. I am concerned that the semi-clay soil of my yard will become a container tomb and inhibit growth and reduce vitality of these plants. He is supposed to call me this evening. What should I say. This gentleman took exception to my questioning his knowledge because "he attended (notice did not say graduated) a major college, has over 30 years of experience and knows what he is doing". My plants all have "volcano mulching" that is somewhat spread out over the grass. A tree peony was planted just over a foot from a foundation wall. I want it moved because they can grow to over four feet wide. He said he's never seen a tree peony four foot wide and he won't move it. Help. I haven't paid him in full yet.