First and Last Frost Dates USDA Hardiness Zone

This information is useful for at least two reasons,

to calculate when to plant seeds or plant seedlings outside in the garden
to figure out how late in the growing season you can plant certain perennials, trees, and shrubs

Dates on this chart are approximations, no one can KNOW the weather, every season is different. Most years, the first and last frost will fall within two weeks of the date on the chart, but some years, we get a very early frost or a late snow storm that throws the dates off. Please use discretion (and your local weather forecast!) along with this chart to plan your seed starting and planting.

First and Last Frost Dates, by Hardiness Zone

USDA Hardiness Zone	First Frost Date	Last Frost Date
1Note: This zone is vulnerable to frost 365 days per year	July 15th	June 15th
2	Autust 15th	May 15th
3	September 15th	May 15th
4	September 15th	May 15th
5	October 15th	April 15th
6	October 15th	April 15th
7	October 15th	April 15th
8	November 15th	March 15th
9	December 15th	February 15th
10	December 15th	January 31st (sometimes earlier)
11	No frost.	No frost.

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