Organic lawn care — relying on natural fertilizers, compost, beneficial insects, and cultural practices rather than synthetic chemicals — works best in climates that do not fight against you. Moderate rainfall, reasonable growing seasons, and summers without relentless heat create conditions where grass can outcompete weeds and resist pests naturally.
We built an organic lawn suitability index to identify the counties where natural lawn care methods have the highest chance of success.
Best Counties for Organic Lawn Care
Nantucket County, MA scores highest on our organic lawn index with a score of 99.9. The Pacific Northwest and upper Midwest dominate the rankings.
| Rank | County | State | Organic Score | Precip (in) | Growing Season | Heat Days |
|---|---|---|---|---|---|---|
| 1 | Nantucket County | MA | 99.9 | 40.86 | 210 | 0.2 |
| 2 | Barnstable County | MA | 99.4 | 45.3725 | 202 | 1.35 |
| 3 | Dukes County | MA | 99.1 | 44.925 | 180 | 2.05 |
| 4 | Dickenson County | VA | 98.8 | 48.449999999999996 | 184 | 2.6666666666666665 |
| 5 | Erie County | PA | 98.7 | 46 | 181 | 2.8000000000000003 |
| 6 | Oswego County | NY | 97.9 | 45.160000000000004 | 180 | 4.6 |
| 7 | Chautauqua County | NY | 97.8 | 43.34428571428572 | 180 | 4.8999999999999995 |
| 8 | Clarke County | VA | 97.8 | 46.35 | 198 | 5 |
| 9 | Newport County | RI | 97.5 | 46.34 | 207 | 5.566666666666666 |
| 10 | Harrison County | OH | 97.2 | 42.58 | 187 | 6.3 |
| 11 | Alleghany County | VA | 97.1 | 41.28 | 182 | 6.5 |
| 12 | Fayette County | WV | 97 | 47.95 | 183 | 6.65 |
| 13 | Buncombe County | NC | 96.9 | 48.943749999999994 | 187 | 6.833333333333333 |
| 14 | Lake County | OH | 96.9 | 44.305 | 198 | 6.9 |
| 15 | Washington County | VA | 96.7 | 47.27 | 182 | 7.4 |
| 16 | Van Buren County | MI | 96.5 | 39.18 | 182 | 7.8500000000000005 |
| 17 | Monroe County | NY | 96.3 | 35.09 | 184 | 8.3 |
| 18 | Suffolk County | NY | 96.2 | 45.22125 | 211 | 8.499999999999998 |
| 19 | Greene County | OH | 96.1 | 43.26 | 189 | 8.6 |
| 20 | Erie County | OH | 96 | 34.03 | 209 | 8.9 |
| 21 | Beaver County | PA | 95.9 | 40.504999999999995 | 181 | 9.1 |
| 22 | Muskingum County | OH | 95.6 | 39.045 | 182 | 9.8 |
| 23 | Portage County | OH | 95.4 | 43.585 | 181 | 10.149999999999999 |
| 24 | Athens County | OH | 95.3 | 41.56 | 181 | 10.5 |
| 25 | Smyth County | VA | 95.3 | 48.15 | 180 | 10.5 |
Methodology
The organic lawn index weights three factors: precipitation balance (35% — 25-50 inches ideal), growing season length (35% — 180-280 days ideal), and low extreme heat (30%). Data from NOAA and USDA.
Data sourced from USDA Plant Hardiness Zone Map (2023), NOAA National Centers for Environmental Information (1991-2020 Climate Normals), and US Drought Monitor. All figures represent long-term averages and may differ from individual-year observations.