Calendar · St. Louis MO · Kansas City MO

Perennial Ryegrass 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.

Perennial ryegrass germinates in 5–7 days, faster than any other common lawn grass, which is why it is the standard "quick green-up" component of Northern seed blends and the standard winter overseed for warm-season lawns from zone 8 south. It is bunch-type, so it does not self-repair, and it is susceptible to gray leaf spot in humid summers.