Lawn Care Guide for Dukes County
Dukes County, Massachusetts
USDA SSURGO / PHZMData Story
About Lawn Care in Dukes County, Massachusetts
Island Living with Strong Growing Potential
Dukes County boasts a lawn difficulty score of 63.9, outperforming the state average of 56.8. The maritime climate of Hardiness Zone 7b provides the mildest winters in Massachusetts, aiding in lawn survival. Despite the island setting, maintaining a green space is easier here than in many mainland counties.
Mild Island Air and Moderate Rain
An annual precipitation of 44.9 inches provides a solid foundation for turf without the risk of frequent flooding. With only 2 extreme heat days and 2,654 growing degree days, the grass avoids the scorching temperatures found further inland. This stability allows for a consistent, albeit long, growing season.
Managing Sandy Island Soils
The soil is heavily sandy at 61.6%, which promotes excellent drainage but makes nutrient retention difficult. A low pH of 4.78 indicates that the soil is quite acidic and requires lime to reach the 6.0 ideal. Adding organic compost can help the 4.6% clay content hold onto moisture and fertilizer.
Short-Term Dryness on the Vineyard
Dukes County experienced only 9 weeks of drought in the past year, though 100% of the area is currently abnormally dry. Because of the high sand content, the soil dries out faster than mainland loams during these dry periods. Drip irrigation and drought-tolerant grass varieties are vital for conserving island water resources.
Planting for the 7b Zone
Fine fescues are ideal for the Vineyard because they handle the sandy soil and maritime winds with ease. Wait for the last frost on May 7 before starting spring projects to ensure success. The long autumn allows for growth well into the season until the November 3 frost.
Lawn Difficulty Score
Top Grass Fit for Dukes County
Excellent match
Jonathan Green Black Beauty Ultra
Jonathan Green
Top cultivar score: 86/100
Zone 7b vs Tall Fescue's 3–8 band.
Soil pH 4.77695494325342 vs Tall Fescue's 5.5–6.5 window.
Precipitation 44.925" + soil AWC vs Tall Fescue's 20–30" need.
Growing-degree-days + frost window vs a intermediate-difficulty establishment.
If you spend any time on lawn care forums, Reddit's r/lawncare, or YouTube lawn channels, one name comes up more than any other: Jonathan Green Black Beauty Ultra. It's practically a cult favorite, and the label, cultivar story, and long-running owner reports explain why. The secret is in the genetics.
In Dukes County, USDA zone 7b, soil pH 4.8, Jonathan Green Black Beauty Ultra scores 86/100 — a strong zone match, adequate moisture, and a long enough establishment window.
Recommended Grasses
Tall Fescue
Festuca arundinacea
Bermudagrass
Cynodon dactylon
Buffalograss
Bouteloua dactyloides
Best Grass Seed for Dukes County
Zone 7b • Cool- and warm-season grasses thrive here.
Find Seeds for Zone 7bClimate Snapshot
Annual Precip
44.9"
Growing Degree Days
2,654.1
Base 50F
Last Spring Frost
05/07
First Fall Frost
11/03
Days Above 95F
2
Hardiness Zone
7b
Seeding Calendar — Zone 7B
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
0.0"
inches of water
Monthly Water
3
gallons
Estimated Monthly Cost
$0.03
at $0.008/gallon average
Estimates based on 45" annual precipitation and estimated evapotranspiration. Actual costs vary by local water rates.
Common Lawn Problems in Dukes County
Acidic Soil
Soil pH of 4.8 is below the ideal range for most grasses (6.0-7.0). Apply agricultural lime to raise pH gradually.
Learn more about regional lawn challenges at The Lawn Report.
Lawn Care Advisory: Dukes County
Lawn Verdict
Dukes County falls in USDA hardiness zone 7b, a favorable range for both cool- and warm-season grasses. with winter lows reaching around 5.0°F. and 2,654.1 growing degree days, sufficient for most common turfgrasses. Moderate rainfall (44.9 inches) generally supports healthy lawns with minimal supplemental watering.
Seasonal Breakdown
Wait until after May 7 to seed or overseed; soil temperatures should consistently reach 50-55°F. Cool summers (July averages 71.3°F) reduce heat stress — maintain regular mowing and moderate watering. Aerate and overseed cool-season lawns by early fall, well before November 3; this is the best renovation window. Cool winters (January averages 32.1°F) mean slow or dormant growth; keep debris off the lawn.
Watering Guidance
With 44.9 inches of annual rainfall, established lawns typically need watering only during extended dry spells. Currently, 100.0% of the county is in abnormally dry according to the US Drought Monitor. Cool summers reduce water demand; overwatering is a bigger risk than drought stress.
Regional Context
Dukes County is close to the Massachusetts average temperature, USDA zone 7b 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 Dukes County in?
What is the best grass for Dukes County?
How much rainfall does Dukes County get?
What is the soil pH in Dukes County?
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 Dukes County