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- Frost Date Estimator
Plan my garden
Know your frost window before you plant.
Enter your ZIP code. We find the nearest NOAA weather station and read 30 years of frost records (1991–2020), then turn them into safe planting dates for lavender.
Your frost dates will appear here
Type a ZIP code and press Find.
Reading 30 years of NOAA records…
Last spring frost
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First fall frost
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Frost-free season
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days in a typical year
USDA zone
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Your year at a glance
Frost-free growing season
Frost-risk window (10%–90% chance)
Best lavender planting window
Today
Spring planting
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Fall planting
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How to read your dates
Frost dates are odds, not promises.
Every date here comes from 30 years of real temperature readings at a weather station near you. Here is what each one means for your lavender.
Median (typical year)
In half of all years, the last frost comes before this date. Good for planning. Too risky for tender new plugs.
“Play it safe” date
Only 1 year in 10 has a frost after this date. That makes it the smart target for setting out young lavender.
Hard freeze (28°F)
Established lavender shrugs off a light 32°F frost. A 28°F hard freeze is the one that can damage new growth.
Frost & lavender questions
Why plant lavender after the frost date instead of before?
A frost rarely kills a healthy lavender. Planting into cold, wet soil is the real risk: roots sit still, water lingers and crowns can rot. Waiting 1–2 weeks past your safe date gives warmer soil and faster rooting.
How late in the fall can I plant?
Give new lavender about 6–8 weeks of root growth before your first fall frost. In zones 5 and colder, spring planting is usually more reliable than fall planting.
Is bare root different?
Bare-root lavender is dormant and soil-free, so it can go in the ground a little earlier, once the soil can be worked and is not waterlogged. Protect it from hard freezes (28°F and below) right after planting.
Where does this data come from?
NOAA’s National Centers for Environmental Information publishes U.S. climate normals for 1991–2020. We use the nearest station that reports freeze probabilities. Your yard may run a few degrees warmer or colder than the station, especially in low spots, near water or in cities.
