The Q&A Archives: Australian Tree Fern - Sphaeropteris Cooperi (Alsophila A.)

Question: I live in north GA. Zone 7. I have the fern in a pot on the patio and it's doing great, but I need to know what to do with it for the winter. Should I leave it out and put it in the cellar if the temp. goes below 20, or bring it into the house? I don't have any

Answer: Since it is from Australia, your tree fern thrives in sunshine, warmth and it likes humidity. It is hardy to USDA zone 8B and will tolerate temperatures as low as 28F. The fronds will die back at those temperatures, but the roots should be okay. Since yours is in a container, you could wrap the container with insulating material to keep the roots from freezing solid. And then you could cart it into an unheated cellar when outside temperatures threaten to get below 28 degrees. Once the temps warm up to 30F and above, you can cart it back outdoors. Don't leave it in the cellar for the entire winter, though. Best wishes with your tree fern.

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