It's best to prune or trim any tree when they are dormant.
Wrong first of all its not river birch its ribber birch, and its best to prune them in late spring or early summer, this is when the tree is most active, and can heal the best. any dead branches need to removed, young "suckers"(which grow closer to the trunk of the tree) need to be removed according to how big you would like the tree to grow and what shape and look you would like it to have. Ribber birches need to be trimmed every 1-2 yrs and should only be trimmed by a licensed arborist, DO NOT try and trim it yourself these trees are very sensitive and f you wound them to badly the try WILL die.
White birch trees (Betula papyrifera) are mainly found in North America, particularly in the northern United States and Canada. They commonly grow in forests, on the edges of lakes, and in wet areas with well-drained soil. White birch trees are known for their distinctive white bark and striking appearance in the landscape.
Oak, Aspen, Birch, Spruce, Pine Spruce covers almost 44% of the surface of the country, pine 15%
The family name of birch is Betula .There are a number of birch native to The USA the best is probably Betula papyrifera the paper birch or canoe birch.
You should not need to prune a young tree unless it needs balanced. A trees best shape is its natural shape.
Out of Lake County Colorado through the Royal Gorge into Kansas and Oklahoma to its outlet near Napoleon Arkansas.
oak or birch is the best
known as the muddiest water.... in Kansas City they drink that water and it is one of the best waters in the world.
Brandon Birch
The Best of Kansas was created in 1974.
rossville grade school is the best school in kansas
Paper birch grows best with short, cool summers where the average July temperature does not exceed 70°F and where there are cold winters with ground snow cover for long periods. Cool climate, high rainfall and good drainage are found in the usual sites of paper birch. No surprise then that 43% of U.S. paper birch is in Alaska, 29% in the Northeastern States and 27% in the Lake States. In Roswell, NM one can expect the leaves to drop during the hot summers, with subsequent weakening of the tree and, after a few years, premature death.
Topeka