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.
I never imagined that I would ever in my life-time write an email with a subject line like this one. I am nearly in tears and at a loss for words, but it has to be written.
How many times have you read that on a plant tag you are considering buying? The most popular tune of organic gardening is “add more compost”.
A frost is defined as a covering of minute ice needles, that forms on surfaces at or below freezing. Even if the actual temperature is not freezing, windchill can cause the moisture in a plant to freeze. A freeze, on the other hand, occurs when the temperature drops well below freezing and may or may not include ice crystals.