Winter Care of Kimberly Ferns

I live in Zone 8. Do I need to dig up ferns to overwinter before frost? They are doing great, and I would hate to have to remove and pot them. Any special care required if I can leave them in ground? Also, I planted some astilbe from bulb this spring but none have flowered. They are planted under a persimmon tree. Plants are only about 4-5 inches high! Did I plant them too deep?

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Kimberly Queen fern is considered hardy only in Zones 9 and 10. Where you live in Zone 8, it likely would not survive outdoors unless it is in a very protected location. They might survive outdoors with heavy mulch as protection, but to be safest, you should dig them up and grow them as houseplants over winter.

 

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There are some types of astilbe that grow only about 6 inches tall. Do you know what kind or variety that you have? It's not unusual for a perennial plant such as astilbe to grow little its first year from a bare root planting. It may take 2-3 years to reach good blooming size. Astilbes appreciate constantly moist soil. Were they watered well all summer long? Drought stress could also have limited their growth.

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