Fig. 5.

Mean time to germinate in spring/summer for each species and temperature treatment listed in Table 1 performed in the absence of autumn. Also shown are the same results after subzero winter temperature (–7 °C, dashed columns), but only if significantly different from the winter-treated seeds performed at 0 °C. Different letters indicate significant differences of MTG at P < 0·05 level (Tukey multiple comparison test).