Not every county offers a long growing season. In Alaska, the northern Great Plains, and high-elevation mountain counties, frost-free periods can be measured in weeks rather than months. For lawn owners in these counties, every warm day counts.
We identified the 25 counties with the shortest growing seasons — places where lawn care is a race against time and cold-hardy grass varieties are not optional but essential.
Counties with the Shortest Growing Seasons
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| Rank | County | State | Frost-Free Days | Hardiness Zone | First Fall Frost |
|---|
Lawn Strategies for Short Seasons
- Choose cold-hardy grasses like Kentucky bluegrass and fine fescue that germinate quickly in cool soil.
- Seed as early as possible in spring to maximize the short establishment window.
- Consider sod installation rather than seeding to bypass the germination period entirely.
- Use winterizer fertilizer in late fall to strengthen roots before dormancy.
Methodology
Counties ranked by shortest growing season length (days between last spring and first fall frost at 32°F). Data from NOAA 1991-2020 climate normals.
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.