The Q&A Archives: Pruning an Oregon Green Pine

Question: I want to know if a Pinus NIgra Oregon Green Pine can take some pruning to increase its oriental aspect and to cause it to fit in a space next to an open stair case that is 8' wide and 12' long.

Answer: According to the catalog description, this tree is "Slow to 10 to 12 ft. tall, 8 to 10 ft. wide in 10 years; 18 to 20 ft. tall, 15 ft. wide at maturity." Although you can try to control the new growth by pinching the candles (growth tips) each spring, the pinching will cause the tree to grow denser than it normally would. This would make it look thicker rather than have an airy "Asian" feel to it. Whether or not you would be happy with the results is a matter of personal taste. You could also consider replacing it periodically as it grows too big for the space. Based on your description I am not certain how it would be fitting into the space you have in mind, but I should mention it does need ample sun to stay healthy. Ideally it would be in sun all day long, otherwise a minimum of about six hours of direct sun including the hour of noon. I hope this helps.

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