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Winters are typically cool, relatively dry, and somewhat brief, albeit highly variable. January has a normal mean temperature of 39.2 °F (4.0 °C), but temperatures reach freezing on an average 71 days and fail to rise above freezing on an average 8.3 days, and, with an average in December through February of 6.3 days reaching 70 °F (21 °C), warm spells are common and most winters see the ...
Tender plants are those killed by freezing temperatures, while hardy plants survive freezing—at least down to certain temperatures, depending on the plant. "Half-hardy" is a term used sometimes in horticulture to describe bedding plants which are sown in heat in winter or early spring, and planted outside after all danger of frost has passed.
Plants in temperate and polar regions adapt to winter and sub zero temperatures by relocating nutrients from leaves and shoots to storage organs. [1] Freezing temperatures induce dehydrative stress on plants, as water absorption in the root and water transport in the plant decreases. [ 2 ]
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The ones that survive the winter can go back outdoors next spring when nighttime temperatures are in the 50s or warmer. Ahead, our step-by-step guide on how to bring your outdoor plants indoors ...
A chilling unit in agriculture is a metric of a plant's exposure to chilling temperatures. Chilling temperatures extend from freezing point to, depending on the model, 7 °C (45 °F) or even 16 °C (60 °F). [3] Stone fruit trees and certain other plants of temperate climate develop next year's buds in the summer.
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It has been adapted by and to other countries (such as Canada) in various forms. A plant may be described as "hardy to zone 10": this means that the plant can withstand a minimum temperature of 30 to 40 °F (−1.1 to 4.4 °C). Unless otherwise specified, in American contexts "hardiness zone" or simply "zone" usually refers to the USDA scale.