Answer: Root depth really depends upon soil type and moisture conditions. Under reasonable growing conditions you can expect to find privet roots in the top 6"-8" of soil, extending out about one and one-half times the diameter of the plant. The roots are not generally thought of as being invasive. Pepper trees, on the other hand, do have invasive roots. You shouldn't have a similar problem with privets. Ligustrum texanum can be pruned and will remain healthy when kept at a 6'-8' height. Enjoy your new hedge!
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