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Watering 80-Year-Old Douglas Fir Stand in Sandy Soil

Question: 15 Doug firs (~80 yr) on ½ acre sandy soil in WA. 3 died in 15 years. Never watered. Rain 9 mo/yr, dry 3 mo. Water? Competition?

Answer

No. Established trees this age have deep taproots accessing groundwater. Deaths likely from insects/disease, not drought. Don't water. Investigate pests if more decline.

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