Calendar · St. Louis MO · Kansas City MO

Kentucky Bluegrass care calendar for zone 6

Moderate winter, warm humid summer; transition-zone climate where cool-season grasses begin to suffer in July–August. Zoysia japonica is the only viable warm-season option (Meyer cultivar). Most lawns are cool-season blends with extra irrigation in summer.

Kentucky bluegrass is the iconic cool-season lawn: fine-bladed, deep emerald-blue under fertility, and the only common species that spreads aggressively by rhizome (so it self-repairs from divots and dog spots). The trade-off is heat sensitivity: by mid-July in zone 7 it browns and goes semi-dormant unless irrigated.