Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) is grown for commercial purposes throughout the Pacific Northwest (PNW), but its productivity differs over the diverse soils of the region.� Understanding Douglas-fir growth is very important for forest managers and researchers who want to predict growth and yield in the PNW.� The variation in age and makeup of soil parent materials in the PNW necessitates a better understanding of the effect of soil water and nitrogen availability Douglas-fir growth. Sixty Douglas-fir installations were installed from southern Vancouver Island, Canada to southern Oregon.� Previous growth of Douglas-fir was measured as King's site index, average annual basal area, and height to diameter at breast height ratio.� Current Douglas-fir growth was measured as the two-year percent change in basal area, height, and volume. To determine climate and soil water availability, weather stations were installed in Douglas-fir installations to measure precipitation, temperature, and soil moisture year-round.� PRISM data was also used to determine monthly precipitation and temperatures at each installation.� At the center of each installation, bulk density, soil texture, and total soil and forest floor carbon and nitrogen were sampled from a one-meter deep pit. �This study will determine if site properties, environmental factors, and/or nutrition can effect growth or biomass allocation in Douglas-fir.