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Trees by Water Requirements Low: In an average precipitation year, supplemental watering is not necessary. These trees work well in xeriscape plantings, especially if weed barrier fabric and mulch protect the soil from drying. Medium: These trees require supplemental water, and will do best on the amount of water necessary to keep a bluegrass lawn healthy (about an inch of water a week in summer). Can withstand short periods of drought. High: Supplemental water is crucial for these trees. They decline rapidly without regular watering during hot, dry conditions, both in summer and in winter.
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Medium: