Growing season is expected to increase across Canada, with implications for forest productivity and composition, by Natural Resources Canada.

The length of the growing season is an important determinant of plant growth and distribution. Longer growing seasons may increase plant productivity and allow new planting opportunities in agricultural and forestry settings. …

There has been a significant increase in growing season length (approximately 2 days/decade) across the country over the 1950–2010 period. If CO2 emissions continue to increase, it is projected that growing seasons at the end of 21st century will be 20–40 days longer than those currently experienced across much of Canada.

On the other hand, if you suspect that the carbon dioxide theory of global warming is exaggerated and the cooling Sun might cause the next few decades to be cooler rather than warmer, it will soon be possible to bet financially on a cooler future through things such as the Canadian wheat lands– see the Cool Futures Hedge Fund.