We had a low temperature of -13F (-25C) this winter but most Yuccas look OK.
Yucca gloriosa 'Highway 421' form from Don looks OK so far.
Yucca 'constricta x filamentosa' X 'reverchonii-thompsoniana' looks flawless.
Yucca 'constricta x filamentosa' X 'Bright Edge x glauca
Clone #1809A' (pollen from Benny J) looks great too.
Yucca elata ssp verdiensis looks fine.
Yucca 'aloifolia x stricta' X arkansana
Yucca rupicola X 'filamentosa x elata'
Another form of Yucca 'constricta x filamentosa' X 'reverchonii-thompsoniana'. These are beauties.