It turns out that the only place in BC or Alberta that really exhibits a slowdown in growth potential in the summer is Osoyoos. Naturally Osoyoos is the warmest and driest city in Canada.
I have always joked that Vancouver is "God's Country" and this graph just goes to prove that. Look at how long our maximum growth potential lasts. This part of the world is the perfect spot for growing cool season turf grasses.
Looking at the Banff growth potential you can see just how short of a growing season they really have. Edmonton and Calgary have longer growing seasons that Banff but they struggle to reach even 75% of the growth potential.
I have also graphed the recommended nitrogen application rates and timings for these cities based on the growth potential model.
|Nitrogen rates based on a maximum nitrogen use rate of 3.5g N m2 for bentgrass.|
Take a look at this data and compare it to what you are currently doing. I really look forward to any feedback from turf managers from Western Canada.