Q.Red Yucca Zone 10
High desert red yuccas planting in decorator rock 1-2” is the size of the rock. What does this expression mean : “ Where the cold air settles ?” The lowest temperature here is in the high teens to low 20’s Thank you

GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on July 13, 2021
Warm air rises and cold air sinks. Red yucca is hardy to USDA zone 5 so it should survive temperatures in the high teens.
https://www.gardeningknowhow.com/ornamental/foliage/yucca/red-yucca.htm
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