I'm curious about what the pro's think and do. We live in northwestern Wisconsin (USDA zone 3B-4A) and have the typical turf grass for this part of the country. 60% bluegrass, 25% fescue and 15% perennial ryegrass. For the last mowing of the year before the snow flies, I've been trying to keep the height at about 1.75" Starting in August I gradually take the lawn down from 3.5" (mid-summer height) to the final 1.75", then in spring, I gradually increase the height. I fertilize 3-4 times per year depending how hot and dry the summer is. Your thoughts on the final winter height.