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10metres i thought it was 12.1 meters tall average Answer. This depends on the type and variety of the conifer. Thuja plicata the Western Red Cedar can grow to 200 feet while Thuja plicata pumila of the same family will only reach about 2 feet.

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15y ago
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12y ago

They can grow up to 20-30 feet tall.

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Q: How tall can coniferous tree grow in 20 years?
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