![]() ![]() They are not predicting the upcoming year’s frost rather, they are averages based on multiple years of historical data. Of course, frost dates are only a general guide. It’s better to protect plants just in case! Weather Forecast However, know that even if air temperatures are as high as 38☏, frosts may occur on the ground and on plants. (We explain the frost tolerance level of different crops below.)Īs gardeners, our frost dates are based on 32 degrees Fahrenheit (0 degrees Celsius) to avoid the risk of any plant death. Hardier plants such as spinach and kale will survive until there’s a hard freeze-28☏ and colder. Second, know that a light frost-32☏ and colder-kills all tender plants such as tomatoes. After all, do you want a 50% chance of your plant dying? However, our calculator assumes a 30% probability of frost. Note: On weather sites, many frost dates are based on a 50% chance of frost.Frost Datesįirst, know approximately when your location typically gets frost. See our Frost Dates Calculator for local average frost dates in spring and fall. If you prepare in advance, you won’t be left stumbling around in the dark the night before freezing weather-and you’ll save your precious plants. Find out how to protect your garden from frost. We’ll explain which vegetables are damaged by frost, different ways to cover and protect your plants from frost, and which vegetables can be left in the ground (because frost actually improves their flavor!).
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