The Bonsai Society of Portland is one of the oldest and largest bonsai clubs in the country, claiming some 600 members.
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How To Grow A Birch Bonsai Tree5. Temperature Birch trees require cool temperatures and cannot tolerate extreme heat. Keep them in a cool environment, ideally between 50-70°F (10-21°C). 6. Fertilizer Birch bonsai trees ...
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