Re: The (forgotten) yuccas at Yale (ID request)
Shocking with that agave. That greenhouse must provide some sort of natural moisture protection not to mention heat. They are pretty cold hardy, but the moisture is a killer. Hopefully Tim pops in on the yuccas. I can't help you, but I did have a baccata survive buried under multiple feet of snow and brutal cold in Dubois, Pa. It died back to the ground every year and really wasn't worth having, but it lived!