Answer: In some years, the foliage just looks ratty in spring. Yuccas are very resiliant plants so they are very likely to recover and put out new foliage to hide the old, especially if they have been there for a long time. However, there are different types of yucca with differing hardiness ranges. Some may do better under snow cover than without snow if they are marginally hardy in your area, and in a wet situation they would be even less hardy because one of their few requirements is a well drained soil. If the location is a low spot for instance and is frequently wet, they may not survive. If this is the case, you could try transplanting them in very early spring, or you could dig out some of the "babies" from along the crown and transplant them for insurance. Good luck with your yuccas.
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