Lawn Care Guide for Somerset County
Somerset County, Maine
USDA SSURGO / PHZMThis week in Somerset County · next up in 7 days (Aug 4)
Get ready to seed cool-season grass — the best fall window is about to open.
Data Story
About Lawn Care in Somerset County, Maine
Success in Somerset County Lawns
Somerset County is a standout for lawn success with a difficulty score of 57.4, much higher than the state average of 49.8. Homeowners in this Zone 5a region find it significantly easier to grow grass than the national median of 50.0.
Mild Summers and Ideal Rainfall
The county receives 43.0 inches of rain per year, which is perfectly aligned with the needs of healthy turf. With only 2 extreme heat days, cool-season grasses remain green and active without the need for constant summer irrigation.
Understanding Your Local Soil Needs
Local soil data is not currently recorded, but standard Maine lawn care involves monitoring for high acidity. Adding a layer of topsoil or compost before seeding can provide the initial boost needed for a thick, healthy lawn.
High Drought Stress in Somerset
Severe drought affects 78.3% of the county right now, presenting a challenge despite the overall high lawn score. Homeowners should utilize mulch-mowing to return moisture to the soil and combat the 31 weeks of drought typical of the last year.
Planting Windows for Somerset County
Plan to seed your lawn between the May 13th spring frost and the September 30th fall frost. Hardiness Zone 5a favors Kentucky Bluegrass and Tall Fescue, which provide excellent winter survival and early spring green-up.
Lawn Difficulty Score
Top Grass Fit for Somerset 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 Somerset County.
Why we ruled these out
- Scotts Turf Builder Bermudagrass — USDA zone 5a is below Scotts Turf Builder Bermudagrass's effective range (6–11); not recommended for this county.
See our fit-score methodology for how survivability is determined.
Recommended Grasses
Tall Fescue
Festuca arundinacea
Choosing grass in Somerset County
Short growing season (140-day window) and severe drought (31 wk in drought / yr) are the two things working hardest against a lawn in Somerset County. Here's how to choose for both — then the specific pick.
- Germinating fast in a short windowPre-germination and priming when the season is tight.
- Drought-tolerant grass seedWhat survives where water is scarce and often restricted.
- Tall Fescue, explainedTraits, care, and where Tall Fescue wins — the species behind your top match.
Top match for Somerset 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
43.0"
Growing Degree Days
1,665.714
Base 50F
Last Spring Frost
05/13
First Fall Frost
09/30
Days Above 95F
2
Hardiness Zone
5a
Seeding Calendar — Somerset County
Personalized to this county’s frost dates — a 140-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 5A.
Plan your seeding — Somerset County
Pick a grass and a goal to get a personalized schedule anchored to this county’s frost dates.
- 1Prepare the seedbedJul 21 – Aug 3
Mow low, dethatch or rake, and loosen the top ½ inch of soil so seed makes good contact.
- 2Sow seedAug 4 – Sep 1
Best window to sow Kentucky Bluegrass in Somerset County, anchored to your local frost dates.
- 3EstablishSep 2 – Sep 29
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
- Overseed bare spots once frost risk passes
- 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
- Core aerate compacted areas
- Apply fall fertilizer (highest N application for cool-season)
- Continue mowing until growth stops
- Rake or mulch leaves to prevent smothering
Winter
- Avoid walking on frozen turf
- Service mower and sharpen blades
- Plan spring soil amendments based on fall test
- Keep lawn clear of debris
Watering Deficit Calculator
Monthly Deficit
0.0"
inches of water
Monthly Water
42
gallons
Estimated Monthly Cost
$0.34
at $0.008/gallon average
Estimates based on 43" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Somerset County
Persistent Drought Conditions
Somerset County experienced drought conditions for 31 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: Somerset County
Lawn Verdict
Somerset County sits in USDA hardiness zone 5a, a transitional zone where cool-season grasses dominate but some warm-season varieties can survive. with winter lows reaching around -20.0°F. though only 1,665.714 growing degree days favor cool-season varieties like Kentucky bluegrass and fescue. Moderate rainfall (43.0 inches) generally supports healthy lawns with minimal supplemental watering.
Seasonal Breakdown
Wait until after May 13 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 66.1°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before September 30; this is the best renovation window. Winters are harsh (January averages 13.2°F); avoid foot traffic on frozen turf and plan snow mold prevention.
Watering Guidance
With 43.0 inches of annual rainfall, established lawns typically need watering only during extended dry spells. 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
Somerset County is 3.1°F cooler than the Maine average, it is somewhat drier than the state average, USDA zone 5a 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 Somerset County in?
What is the best grass for Somerset County?
How long is the growing season in Somerset County?
How much rainfall does Somerset 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 Somerset County