Answer: Cyathea cooperi is the Australian Tree Fern. It's hardy to 20F but may suffer some damage to the fronds. If you prune off winter damaged fronds the plant will generate new fronds. It will eventually reach 20' high and about 12' wide, so be sure to give it ample growing room. Provide your tree with partial afternoon shade for best growth. If you can situate it within the shade your honey locust casts during hot summer afternoons it will be quite happy. Best wishes with your tree fern.
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