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Reaching heights between 40 and 70 feet, the river birch is one of the hardier birch trees. They grow best in full to partial shade and thrive in well-drained, slightly acidic soils. The river birch is not a drought tolerant tree, preferring sites that are wet.aper Birch (Betula papyrifera). Paper birch trees are large, oval in shape and may be single or multi-trunked. They reach heights between 50 and 70 feet. Younger trees have brown bark, as trees age the bark turns white and peels to reveal an inner bark that is orange in color.
Habitat: Grey birch can often be found with white birch and its associated species, again on dry sites, while bog birch lives up to its name, being found in acidic, boggy areas. It needs full sun to thrive and is usually surrounded by plants with similar tolerances-willow, rose, Labrador tea, larch and black spruce.rey Birch (Betula populifolia). Background: The four birches native to Prince Edward Island range from the common to the very rare. As with other families, each member has a distinct place in our Island ecosystem, though there may be two or even three species growing in the same area.