Total height (mean ± s.d.) at the end of the second growing season (H2) of white spruce seedlings from two seed sources grown at eight forest plantation sites. Means having the same letters are not significantly different at α = 0.05. Wend, Wendover; Dori, Dorion; Watf, Watford; Pica, Picard; Asse, Asselin; Devi, Deville; Rous, Rousseau; LacB, Lac Bergeron; South, southern seed source (SO1-1); north, northern seed source (SO1-5).