Selecting a fruit tree that gives you improved tolerance to freezing winter temperatures may be a better idea in the long run
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One way to find out if an unnamed plant is xeric is to water it less often during the cooler months. If it starts looking bad to your eyes or dies, then it is most likely not xeric.
Native plants have a very wide and established root system. Big native plants look beautiful but are exceedingly difficult to move from the wild primarily because of their established root system.
Smaller plants do the same job as larger plants and use less water. If you already have large trees and shrubs, prune them smaller.