Most slow down, a bit like hibernating (see Yahoo answers to the same question: http://answers.Yahoo.com/question/index?qid=20080202020452AA189mU). Trees that don't lose their leaves can continue to photosynthesise in winter. Some trees flower in winter and others grow berries, so these ones are obviously still active above ground. All of them are active below ground - their roots continue to grow. (See this article: http://www.commercialappeal.com/news/2008/nov/28/tree-roots-grow-during-winter/)
No, because oak trees goes hibernation (dormant) during winter to conserve energy
According to the plumber augering my main line, tree roots can still grow in the winter. And our winters here are -30C. A gardening site says that tree roots can grow if the underground temperature is 40F, about +4C.
The xylam loss their capacity
they do because they get a lot of water
deciduous trees
They can grow anywhere other trees grow. Hardwoods are known as Conifers & they lose their leaves in the winter. Non hardwood trees, are call dicidous trees and dont lose their green in winter. Bamboo is a Grass not a wood at all & some hardwood trees are sofether than some Dicidous trees so its an imprecise designation.
when Autumn stops and Winter start the trees get cold and have to grow more leaves
Because it is cold , not that much sunlight , the trees need sunlight water to grow that's also why some types of trees drop their leaves before winter
Types of trees that lose their leaves in winter in order to avoid freezing is an example of an environment. Trees that grow in colder environments lose their leaves in winter.
deciduous trees
Generally, coniferous trees grow in the winter. It is also the growing season for citrus, hearty leafy greens, squash, and root vegetables.
All coniferous trees, deciduous trees, and many shrubs are perennials that live through the winter. They are dormant through the winter and grow during the spring and summer. Garden plants, like fruits, vegetables, herbs, and flowers grow in spring and summer, though there are some vegetables that may grow during the winter with special care or in a greenhouse.