Answer: The commonly called red yucca is actually not a yucca, but Hersperaloe parvifola, which is hardy in zones 6-11 (zone six is -10 to zero degrees). Many succulent-type plants will turn somewhat purple when exposed to cold temperatures. As long as the root system is still viable, the plant should be okay. However, extremes of temperature can be very stressful, especially if a plant doesn't have a chance to "harden off."In spring, slowly ?harden off? or acclimate your plant to moving back outdoors by putting it outside in a sheltered location for a couple hours at a time, gradually increasing the time period. In fall, do that in reverse, rather than abruptly moving from outside to inside, which will help lessen the shock. Be careful not to overwater in a container situation. These plants don't like wet roots. I hope this info helps!
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