Answer: Prunus cistena has a shrubby growth pattern and will be difficult to train into a tree. Prunus besseyi is the western sand cherry, and Prunus pumila is the dwarf sand cherry. If you have a choice, go for the dwarf sand cherry as its ultimate height is only about 8'. P. besseyi can grow to 25' in height. Generally, you can expect tree roots to extend one and one-half times as far as the canopy of the tree. In a mature sand cherry, that means the roots will extend 25'-40' out from the trunk. The dwarf version of the sand cherry will have roots extending only 8'-12' from the trunk.
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