Washington Grass Types

Looking for the optimal grass varieties for lawns in Washington? Below is a comparison table and accompanying data that will give you information about what grasses are best suited for Washington and its inner counties.

Note: Cold, heat, drought, and saturation tolerance are measured on a score of 0-5 with 0 being the least tolerant and 5 being the most.

Zoysia Grass

Most suitable grass (on average)

Buffalo Grass

Optimal for colder areas

Tall Fescue

Optimal for hotter areas

Kentucky Bluegrass

4th most suitable (on average)

Kikuyu Grass

Great for areas with heavy rainfall

Bermuda Grass

Ideal for drought-prone areas

Annual Ryegrass

Best suited for shaded areas

Lawn Visual
Seasonal Type Warm Warm Cool Cool Warm Warm Cool
Cold Tolerance 2.5 3.5 4.0 4.0 1.5 1.0 4.0
Heat Tolerance 4.0 4.0 3.5 2.5 4.5 5.0 2.0
Drought Tolerance 3.5 5.0 3.5 3.0 4.5 4.5 2.5
Saturation Tolerance 2.0 2.0 3.0 3.0 2.5 1.0 4.0
USDA Zone(s) 6-13 5-9 5-8 1-7 6-13 8-13 1-7
Sun Exposure Full Sun, Partial Shade Full Sun, Deep Shade Mostly Sun, Deep Shade Mostly Sun, Partial Shade Full Sun, Light Shade Full Sun, Light Shade Mostly Sun, Deep Shade
Traffic
Resistance/Recovery
Moderate, Moderate Low, Slow Moderate, Moderate Moderate, Moderate High, Moderate High, Rapid Moderate, Rapid
Watering
Duration/Amount
Weekly, 1 inch Bi-weekly, 0.5 inches Weekly, 1-1.5 inches Weekly, 1-1.5 inches Weekly, 1-1.25 inches Weekly, 1-1.25 inches Weekly, 1-1.5 inches
Mowing
Duration/Height
Every 7-10 days, 0.5-1.5 inches Every 10-14 days, 2-3 inches Every 5-7 days, 2-3.5 inches Every 5-7 days, 2.5-3.5 inches Every 7 days, 1-1.5 inches Every 5-7 days, 0.5-1.5 inches Every 5-7 days, 1.5-2.5 inches
Soil Well-drained, Loamy
pH: 6.0-7.0
Well-drained, Loamy to Sandy
pH: 6.0-7.5
Adaptable
pH: 5.5-7.5
Well-drained, Loamy
pH: 6.0-7.0
Well-drained
pH: 5.5-7.0
Sandy, Well-drained
pH: 5.8-7.0
Adaptable
pH: 5.5-7.5
Texture Fine to Medium Fine Coarse Fine to Medium Medium to Coarse Fine to Medium Fine
Color Light Green Blue-Green Dark Green Rich Green Dark Green Dark Green Bright Green

Washington Zones

The interactive map below shows the USDA plant hardiness zones specific to Washington. Each zone in the map represents a certain temperature range that is critical for plant survival and growth, divided based on the average annual minimum winter temperature. Click on the map to see the optimial grass types for each county.

Zone No. 6 7 8
Map Color
Lowest Avg. Winter Temperature -10° to 0°F 0° to 10°F 10° to 20°F

The chart and table below shows the average monthly precipitation and minimum/maximum temperatures in Washington over the last 5 years.

Month Min Temp (°F) Max Temp (°F) Prep (in)
Jan28.56 °F39.34 °F7.34"
Feb24.32 °F39.02 °F4.46"
Mar29.34 °F48.5 °F2.68"
Apr34.54 °F55.5 °F3.16"
May42.4 °F64.66 °F2.33"
Jun47.96 °F71.3 °F1.96"
Jul53.22 °F80.3 °F0.42"
Aug53.48 °F80.1 °F0.53"
Sep47.28 °F70.48 °F2.23"
Oct37.8 °F57.7 °F3.89"
Nov30.26 °F44.08 °F5.76"
Dec25.98 °F36.46 °F6.4"

The chart below shows the optimal months for seeding or sodding new grass in Washington. Suitability for each month is based on the average monthly temperature in Washington.

July and August are the most optimal months for planting cool-season grasses in Washington.

July and August are the most optimal months for planting warm-season grasses in Washington.

Grass Types by County in Washington

Below is a list of counties in Washington. Click on any county to get a more detailed analysis.

Data source and citation

Raw data for the grass characteristics was sourced from the USDA's PLANTS Database.

Data for climate zones in Washington was gathered from the USDA Plant Hardiness Zone Map as well as GIS datasets from the Oregon State University PRISM Climate Group.

Average monthly temperatures and precipitation data for Washington was sourced from the NOAA National Centers for Environmental information.

Please use the citation tool below to reference any information found on this page.

  • "Washington Grass Types". LawnVariety.com. Accessed on July 20, 2024. https://lawnvariety.com/washington.

  • "Washington Grass Types". LawnVariety.com, https://lawnvariety.com/washington. Accessed July 20, 2024

  • Washington Grass Types. LawnVariety.com. Retrieved from https://lawnvariety.com/washington.