![]() ![]() Cool-weather crops do not grow well when the air temperature is greater than 75☏ (24☌). Most cool-season crops grow well when the air temperature is in the 60°s Fahrenheit-upper teens Celsius.Cool-season vegetables require a minimum soil temperature of 40° to 50☏ (5-10☌) to grow.To grow vegetables during the cool time of the year, keep the following in mind: Root crops will actually become sweeter with frost. Broccoli, kale, spinach, arugula, and turnips will produce deep into autumn and winter-even when temperatures dip below freezing at night. Most cool-weather crops will not be harmed by the first frost or two in autumn. ![]() Plastic tunnels will keep crops 10☏ warmer than the outside temperature row covers will keep crops 4☏ warmer or slightly more. Cool-season crops can be planted again in mid to late summer so that they mature in the cool of autumn.įor spring harvest, sow seed so that crops come to harvest before daytime temperatures trend in the 60°sF this may require starting seed indoors or under cover of plastic tunnels or garden fabric row covers-to make sure the soil is warm enough for seed germination.Īs well, you can protect fall harvest crops or extend the growing season by covering cool-weather edibles with row covers or plastic tunnels when temperatures dip. These edibles want to get their start in warm soil-either in the mid- or late-summer garden for autumn harvest or indoors or undercover for spring harvest they want to come out of the garden while temperatures are cool-averaging in the low 60°sF or cooler.Ĭool-season vegetables should be planted in late winter or early spring so that they mature in mid-to-late spring before the weather grows warm. Salad greens, sweet root crops, and peas are cool-weather vegetables for fall and spring harvest. Temperature and planting cool-season vegetables Suggested cool-season vegetable crop varieties.Use seed packets to know planting dates.Temperature and planting cool-season vegetables.Hardy cool-season crops such as this young cabbage plant can withstand a freeze. The terms “hardy” and “semi-hardy” are important when deciding which crops to plant where you live. Hardiness is a term used to describe a cool-season plant’s ability to survive winter without protection. Once the weather warms, cool-season crops will be done and you will want to plant warm-season crops. Plant Cover Freeze Protection with Hoops. ![]() Good Products for Season Extension at Amazon: Then plan your sowing, transplanting, and harvesting accordingly–marking your calendar. Conversely, make sure cool-weather crops planted in late summer and early autumn have enough time to reach harvest before the first heavy freeze or big snowstorm.Ĭheck the seed packet or the plant markers that come with vegetable starts to see how many days the seed or plant requires to reach maturity. Make sure that cool-season crops planted in spring have enough time to reach maturity before the weather turns warm. Many can withstand temperatures colder, but few can thrive in temperatures warmer. These crops do best in temperatures between about 40☏ and about 70☏ (4-21☌). Cool-season vegetables are for planting and growing in late winter, early spring, or in late summer, autumn, and early winter. ![]()
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