Answer: The general rule of thumb when spacing trees or shrubs is to place them far enough apart to allow enough elbow room to reach maturity without crowding. If you space your shrubs 10' apart, they will touch when fully mature. If you want to produce a dense privacy barrier you can plant them 5' apart and they will grow into one another. This won't compromise their health and will produce a thicket of branches to screen whatever is on the other side. Hope this answers your question!
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