All Chapters
Find your zone.
Every cool-season USDA hardiness zone is its own chapter — climate notes, recommended seed mixes, lawn calendar, and merch.
Not sure of your zone? Look it up on the USDA hardiness zone map.
Zone 3a Club
Cool-Season
Pure cold-hardy lawn strategy for the upper Midwest and northern Plains.
-40°F to -35°F · ~110 growing days
Zone 3b Club
Cool-Season
Northern lawn strategy where winters still bite but the growing season stretches a few more weeks.
-35°F to -30°F · ~120 growing days
Zone 4a Club
Cool-Season
The classic Midwest cool-season lawn zone — KBG country with snow you can count on.
-30°F to -25°F · ~130 growing days
Zone 4b Club
Cool-Season
Cool-season prime — long enough season for KBG to truly perform, cold enough that warm-season grasses never compete.
-25°F to -20°F · ~140 growing days
Zone 5a Club
Cool-Season
Cool-season heartland — Iowa, Ohio, Indiana — where KBG and tall fescue both perform.
-20°F to -15°F · ~155 growing days
Zone 5b Club
Cool-Season
The northern edge of the transition zone — KBG still rules but tall fescue earns its spot.
-15°F to -10°F · ~165 growing days
Zone 6a Club
Cool / Transition Edge
Transition-zone leaning cool — where KBG, TTTF, and fine fescue all earn their spot.
-10°F to -5°F · ~175 growing days
Zone 6b Club
Transition Zone
Transition zone strategy. Cool-season grass that handles real heat — and doesn't apologize for it.
-5°F to 0°F · ~185 growing days
Zone 7a Club
Transition Zone
The hot edge of cool-season — TTTF rules, KBG is a nostalgia play.
0°F to 5°F · ~200 growing days
Zone 7b Club
Transition Zone
The cool-season frontier — TTTF survives, but warm-season grasses creep in. Pick your team and commit.
5°F to 10°F · ~215 growing days