Hi. I know Foxtail ferns are hardy down to 20 degrees. I am in USDA Zone 7 at 6700 feet elevation. We get some cold nights in the winter. But I have had success with plants hardy to zone 9 covering for frost/snow or overwintering or cutting back to the ground. Anyone else have success with these plants? I'd consider just potting them and bringing them in in the winter but I'd sure prefer to put them in the ground. Any experience or suggestions? I have read the forum below so know the nature of re-potting etc. Thanks. New member here...