Lawn Care Guide for Benewah County
Benewah County, Idaho
USDA SSURGO / PHZMThis week in Benewah County · next up in about 2 weeks (Aug 9)
Get ready to seed cool-season grass — the best fall window is about to open.
Data Story
About Lawn Care in Benewah County, Idaho
Benewah Outperforms Most of Idaho
Benewah County earns a lawn difficulty score of 38.1, making it one of the more favorable spots in the state for growing grass. While this is still below the national average of 50.0, the Zone 6b climate offers more moisture than most of Idaho. Success here is often limited more by recent drought trends than by the natural climate baseline.
Rain-Rich Idaho Panhandle Weather
At 29.8 inches of annual precipitation, Benewah County is near the ideal 30-50 inch range for healthy lawns. The climate is further tempered by having only 18 extreme heat days, which keeps the grass from scorching in the summer. A moderate 1,872 growing degree days provides a steady, manageable pace for mowing and maintenance.
Leveraging Natural Moisture and Soil
Soil data for Benewah is currently sparse, but the high annual rainfall suggests that drainage management is more important here than in drier counties. If your lawn feels soggy after rain, consider aerating to help water penetrate the soil profile. Checking your pH is still vital, as higher rainfall can sometimes lead to slightly more acidic conditions over time.
Severe Drought Challenges a Moist Baseline
Despite the high average rainfall, the county has suffered through 53 weeks of drought, with nearly 88% of the area in severe drought. This unusual trend makes water conservation critical, even in a region that usually gets 29.8 inches of rain. Prioritize keeping your grass dormant rather than over-watering if local restrictions are in place.
The May to October Growing Window
Take advantage of the post-frost window starting after May 11th to seed your Zone 6b lawn. Perennial ryegrass and Kentucky bluegrass thrive in these Panhandle conditions with their balanced summer heat. You have until the first frost around October 5th to ensure your lawn is well-established before winter.
Lawn Difficulty Score
Top Grass Fit for Benewah County
Cool-season grasses are the general fit here
County soil and zone data are incomplete, so we show a category recommendation rather than a precise cultivar score for Benewah County.
Recommended Grasses
Buffalograss
Bouteloua dactyloides
Blue Grama
Bouteloua gracilis
Tall Fescue
Festuca arundinacea
Choosing grass in Benewah County
Severe drought (53 wk in drought / yr) and short growing season (147-day window) are the two things working hardest against a lawn in Benewah County. Here's how to choose for both — then the specific pick.
- Drought-tolerant grass seedWhat survives where water is scarce and often restricted.
- Germinating fast in a short windowPre-germination and priming when the season is tight.
- Tall Fescue, explainedTraits, care, and where Tall Fescue wins — the species behind your top match.
Top match for Benewah County: Tall Fescue
See the full breakdownPremium Grass Seeds is a sister site in our network. We may earn a commission from qualifying purchases made through its retailer links — this never affects your price. Guidance here reflects your county’s climate and soil data, not hands-on testing.
Climate Snapshot
Annual Precip
29.8"
Growing Degree Days
1,871.5
Base 50F
Last Spring Frost
05/11
First Fall Frost
10/05
Days Above 95F
18
Hardiness Zone
6b
Seeding Calendar — Benewah County
Personalized to this county’s frost dates — a 147-day growing season. Windows below are computed from local last-spring and first-fall frost normals, so they differ county-to-county even within USDA Zone 6B.
Plan your seeding — Benewah County
Pick a grass and a goal to get a personalized schedule anchored to this county’s frost dates.
- 1Prepare the seedbedMay 10 – May 23
Mow low, dethatch or rake, and loosen the top ½ inch of soil so seed makes good contact.
- 2Sow seedMay 24 – Jun 21
Best window to sow Buffalograss in Benewah County, anchored to your local frost dates.
- 3EstablishJun 22 – Jul 19
Protect young seedlings: mow only after they reach ~3 inches and hold off on weed pre-emergents until established.
Keep the seedbed consistently moist — roughly ¼ inch of water daily, split into shorter cycles if the surface dries out quickly. County-specific soil texture isn’t available here, so adjust to how fast your own soil drains.
Seasonal Lawn Care Checklist
Spring
- Apply pre-emergent herbicide when soil reaches 55F
- Begin mowing when grass reaches 3 inches
- Start irrigation if rainfall is below 1 inch/week
- Soil test every 2-3 years — adjust lime or sulfur as needed
Summer
- Mow at recommended height weekly
- Water deeply 1-2 times per week (1 inch total)
- Avoid fertilizing cool-season grasses in peak heat
- Scout for grubs and treat if >10 per sq ft
Fall
- Overseed warm-season lawns if thinning
- Apply fall fertilizer (highest N application for cool-season)
- Continue mowing until growth stops
- Rake or mulch leaves to prevent smothering
Winter
- Apply pre-emergent for winter weeds
- Service mower and sharpen blades
- Plan spring soil amendments based on fall test
- Keep lawn clear of debris
Watering Deficit Calculator
Monthly Deficit
1.1"
inches of water
Monthly Water
3,571
gallons
Estimated Monthly Cost
$28.57
at $0.008/gallon average
Estimates based on 30" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Benewah County
Persistent Drought Conditions
Benewah County experienced drought conditions for 53 of the past 52 weeks. Prioritize water-efficient grasses and consider reducing lawn area.
Learn more about regional lawn challenges at The Lawn Report.
Lawn Care Advisory: Benewah County
Lawn Verdict
Benewah County sits in USDA hardiness zone 6b, a transitional zone where cool-season grasses dominate but some warm-season varieties can survive. with winter lows reaching around -5.0°F. though only 1,871.5 growing degree days favor cool-season varieties like Kentucky bluegrass and fescue. Moderate rainfall (29.8 inches) generally supports healthy lawns with minimal supplemental watering.
Seasonal Breakdown
Wait until after May 11 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 67.3°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before October 5; this is the best renovation window. Cool winters (January averages 30.3°F) mean slow or dormant growth; keep debris off the lawn.
Watering Guidance
Moderate rainfall (29.8 inches) means lawns benefit from weekly deep watering during summer stress. Currently, 100.0% of the county is in moderate drought according to the US Drought Monitor. Consider reducing irrigation frequency and allowing cool-season lawns to go semi-dormant during peak heat. Cool summers reduce water demand; overwatering is a bigger risk than drought stress.
Regional Context
Benewah County is close to the Idaho average temperature, it is significantly wetter than the state average (12.8 inches more), USDA zone 6b helps guide grass selection compared to neighboring counties.
Want detailed soil composition, drainage classes, and soil series data? View soil details on SoilByCounty.com
Frequently Asked Questions
What USDA hardiness zone is Benewah County in?
What is the best grass for Benewah County?
How long is the growing season in Benewah County?
How much rainfall does Benewah County get?
Data sourced from USDA SSURGO, NOAA Climate Normals (1991-2020), USDA Plant Hardiness Zone Map, and US Drought Monitor. Lawn difficulty scores and grass recommendations are estimates for informational purposes only.
Explore more data for Benewah County