Thorny Tree: Poncirus trifoliata

“This tree is growing in my new yard. What is it? It has huge green thorns and white flowers that bloomed in spring.” –Question by Betty in Charleston, South Carolina

ANSWER: This is the hardy orange (Poncirus trifoliata). Later in the summer it will develop inedible orange fruits. It is grown as an ornamental, though this tree is not for everyone. Some people like the striking look of its enormous green thorns, white flowers, and showy fruits, and its green stems add winter interest. It also has three-lobed leaves that turn yellow in fall. But, the thorns are not child-friendly, and heavy duty gloves are required to prune it. Otherwise, it is trouble free. If you like its looks, and can avoid its thorns, consider keeping it for its ornamental value.

Happy Gardening!

 

Jessie Keith

 

About JESSIE KEITH


Plants are the lens Jessie views the world through because they’re all-sustaining. (“They feed, clothe, house and heal us. They produce the air we breathe and even make us smell pretty.”) She’s a garden writer and photographer with degrees in both horticulture and plant biology from Purdue and Michigan State Universities. Her degrees were bolstered by internships at Longwood Gardens and the American Horticultural Society. She has since worked for many horticultural institutions and companies and now manages communications for Sun Gro Horticulture, the parent company of Black Gold. Her joy is sharing all things green and lovely with her two daughters.

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