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Snow is most likely to fall in January, followed by February, December, and March. These include kale, cabbage, parsnips, carrots, beets, and brussels sprouts. Frosty weather helps the starch in the root turn to sugar so they taste sweeter. This brings the area's average first freeze to Nov. 8, but that window can be expanded from Nov. 1 to 10.
Planting Guides for North Carolina
Here is some general info for USDA Zone 8a to help you get started.
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Find the cities near you for a good estimate of your frost dates. These dates can vary year by year, usually within about a two-week window. Many believe that using your zip code will lead you to a more accurate frost date. There are a few different websites to refer to, including davesgarden.com, the Old Farmer's Almanac, and the National Gardening Association. Just keep in mind that these dates are an average and don't take into consideration any microclimates on your property.
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These charts can help you estimate when to expect the first frost in fall, and the last frost in spring, so that you know when to plant in your garden or meadow. Our spring planting calendar starts with the very first dates that you can plant (based on the last spring frost). You can turn to a few different sources to determine the average frost dates in your area, as noted.
USDA Zones
Typically, frost can occur when the temperature falls below 36°F, especially in rural areas. It is a localized phenomenon and can be quite variable across a small area. Debra LaGattuta is a Master Gardener with 30+ years of experience in perennial and flowering plants, container gardening, and raised bed vegetable gardening. She is a lead gardener in a Plant-A-Row, which is a program that offers thousands of pounds of organically-grown vegetables to local food banks.
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NWS Raleigh Frost Freeze Information and Climatology Maps
The dates listed below are estimated average light frost dates based on historical data from the National Climatic Data Center. A light frost is when temperatures are between 29°–32°F. During a light frost, tender plants may be killed, with little destructive effect on hardier vegetation. Starting seeds indoors (in seed trays or starter pots) gives your crops a head start on the growing season, which is especially important in regions with a short growing season. Starting seeds indoors also allows young, tender plants to grow in a stable, controlled environment. Indoors, you can control these elements to maximize your plants' early growth and give them the best shot at thriving when they are transplanted outdoors.
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Frost becomes more widespread when the temperature falls below 32°F with some freeze possible. A Freeze Watch may be issued a few days ahead of time if the potential exists for temperatures to fall into these thresholds. A Frost Advisory is issued when temperatures are forecast to be in the 33°F to 36°F range with good radiation conditions.
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However, note that some cool-seasons crops such as kale and lettuce do not grow well in hot temperatures, which can cause bolting issues. For some gardeners, especially in the South, a break to avoid summer heat is needed, but they can start once the heat has passed. The chart below includes average frost dates for cities across the U.S.
You can learn more about this age-old technique below. The area has seen about 791.3 inches of snow since 1878, according to data from the National Weather Service, for an average of about 4.3 inches of snow between Oct. and May. Most vegetables and herbs need to be harvested before the first frost, which will turn them brown or mushy. A 29 to 32 degree frost may only damage the leaves, inhibiting their ability to photosynthesize. The second frost might not come for another few weeks allowing a little more harvest time. Below are images depicting the earliest, median, and the latest dates for the last 36°F Frost, 32°F, and 28°F freezes across our region.
The crops that should be started indoors are particularly susceptible to cold temperatures or have a very long growing season and need a head start. These include tender vegetables such as tomatoes, peppers, and eggplant and crops with a long growing season, like broccoli, cauliflower, and Brussels sprouts. Frost dates are important for gardeners to know, as they signal the start and end of the gardening season.
For most crops that can be started indoors, seeds should be started about 6-8 weeks before your last spring frost date. This gives the plants ample time to grow large and healthy enough to survive their eventual transplanting to the garden. To keep informed about latest updates and possible zone adjustments, see the official USDA Plant Hardiness Zone Map website.
A frost date is the average date of the last light freeze in spring or the first light freeze in fall. The dates provided are based on the number of weeks before or after frost, so we can provide a unique calendar to every user in the country. Thus, several crops (especially similar crops) may appear to have the same date. Kale and lettuce, for example, or dates for starting seeds, like broccoli and cabbage. In fact, many crops with short maturity times (such as radishes) can be succession planted all the way through the summer in northern areas.
Deeper valleys tend to have frost conditions earlier than the surrounding area since cold air sinks. Want to know when to expect your last frost of the spring, or the first frost of the fall? Enter your zip code (or City, State) below and we'll tell you what we know. Our information is taken directly from the National Weather Service and depending on the location of the reporting station for your zip code, the results may vary. The growing season, however, can end early once the first hard freeze or "killing freeze" happens to the area.
Frost is predicted when air temperatures reach 32°F (0°C). Still, a frost may occur even when air temperatures are just above freezing due to open exposure to the clear night sky, which exposes surfaces to radiative cooling. Always keep an eye on your local weather forecast and plan to protect tender plants accordingly. Weather, topography, and microclimates may also cause considerable variations in the occurrence of frost in your garden. To ensure the safety of your tender plants and fall harvests, you might want to adjust the average frost dates that are published for your region. Consider planting two weeks later in spring and two weeks earlier for fall/winter to protect your plants from unexpected and abnormal cold temperatures.
Check out these maps from the North Carolina State Climate Office (NCSCO) for freeze information on your location. Notifications can be turned off anytime in the browser settings. Most of the vegetation is usually done for the year by then, and residents have to wait until spring to start again. Plain and simple, Charlotte usually sees frost for the first time from late October to the first third of November. See each plant's individual Growing Guide for more specific planting, plant care, and harvesting information. This means that on a really cold year, the coldest it will get is 10°F.On most years you should be prepared to experience lows near 15°F.
The changing color of leaves during fall is a completely separate phenomenon from the falling temperatures. Leaf color change is caused by the shortening of days from summer to fall. Interestingly, the brilliant fall color is there all summer, but until fall, it is hidden by the production of (green) chlorophyll. As days shorten in fall, leaves shut down their chlorophyll production, and their real pigments are revealed. These are averages so a frost could come a few weeks earlier or later than the stated dates.
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