This study investigates the impact of planting time on Douglas-fir plantation performance in the Coast-Interior Transition biogeoclimatic subzones, correlating it with climatic conditions measured by the Canadian Forest Fire Weather Index System. The research, conducted across twelve plots in the Pemberton Valley and Fraser Canyon, aimed to understand why plantation performance in this region has historically been poor, with planting time frequently cited as a contributing factor. The methodology involved establishing research plots on freshly clearcut-logged and slash-burned sites, planting two 50-tree rows per planting date at each location. Despite the initial setup of twelve plots, remeasurement was limited to five locations due to experimental age and survival rates.

This technical report details a specific forestry research project, likely intended for a specialized audience of foresters, ecologists, and researchers. The methodology and focus on the Canadian Forest Fire Weather Index System suggest a data-driven approach to understanding plantation success. The findings would be of interest to those managing or studying forest resources in similar transitional climate zones. The report's value lies in its empirical data and its contribution to understanding the complex interplay of planting time, climate, and forest growth.