Cool-Season Grass
Perennial Ryegrass
Lolium perenne
Growing Specifications
Drought Tolerance
2/5
Shade Tolerance
2/5
Traffic Tolerance
5/5
Maintenance Level
3/5
Mowing Height1.5" - 2.5"
Water Needs25-35"/yr
Optimal pH6 - 7
Ideal Growing Zones
Zone 3AZone 3BZone 4AZone 4BZone 5AZone 5BZone 6AZone 6BZone 7A
Zone map coming soon
Counties Where Perennial Ryegrass Thrives
Sierra County
CA
Benton County
AR
Carroll County
AR
Broomfield County
CO
Fulton County
AR
Washington County
AR
Alpine County
CA
Alamosa County
CO
Arapahoe County
CO
Boulder County
CO
Archuleta County
CO
Lassen County
CA
Modoc County
CA
Mono County
CA
Adams County
CO
Baca County
CO
Bent County
CO
Apache County
AZ
Coconino County
AZ
Navajo County
AZ
Frequently Asked Questions
What USDA hardiness zones does Perennial Ryegrass grow best in?
Perennial Ryegrass performs best in USDA hardiness zones 3a through 7a.
How much water does Perennial Ryegrass need per year?
Perennial Ryegrass typically requires 25–35 inches of water per year. It has limited drought tolerance and needs consistent irrigation during dry spells.
What is the recommended mowing height for Perennial Ryegrass?
Mow Perennial Ryegrass to a height of 1.5–2.5 inches. Maintaining the correct height helps the grass develop deep roots, resist weeds, and recover from heat or drought stress.
How drought-tolerant is Perennial Ryegrass?
Perennial Ryegrass has poor drought tolerance (2/5). It requires reliable rainfall or irrigation and is not suitable for counties with frequent drought conditions.
How does Perennial Ryegrass perform in shade?
Perennial Ryegrass has poor — prefers full sun (2/5). Plant it only in areas that receive at least 6–8 hours of direct sunlight daily.
What is the maintenance level for Perennial Ryegrass?
Perennial Ryegrass requires moderate maintenance (3/5). The ideal soil pH range is 6–7. Standard lawn care practices including seasonal fertilization and timely mowing are sufficient.
Grass species data compiled from university extension publications and USDA resources. Growing recommendations are general guidelines — consult your local extension office for specific advice.