>>why some trees are wrapped for protection during winter and others aren't? Does anyone know?
There are two reasons why conifers are wrapped: 1. To protect tree from the snow. Heavy snow can break branches. 2. To protect tree from the sunburn. During winter tree can't get enough water from the frozen ground. That's why sun (because of the photosynthesis) can make tree dry.
Maybe I can make it back to St. Petersburg this summer. And thanks for the beach photo in my other post. It's weird to see the water of the Neva River because it was completely frozen when I visited in February. The city must have a completely different feeling in summer.
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There are two reasons why conifers are wrapped:
1. To protect tree from the snow. Heavy snow can break branches.
2. To protect tree from the sunburn. During winter tree can't get enough water from the frozen ground. That's why sun (because of the photosynthesis) can make tree dry.
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http://mirror03.lensart.ru/4d/picturecontent-pid-2284d.jpg
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