There were quite a few. The fact that they hadn't seen warmth or water in the past few weeks is likely what saved them. Hardy Agaves are quick to harden off and need little or no water when cool (and in fact can be harmed by too much water), while tender Agaves want to keep growing and drinking no matter what. I had 28°F tender Agaves (even several Sansevierias!) get through sub-20°F temps with little or no damage. And no, it wasn't the end result of a brilliant plan, it was just dumb luck.
Good for you and the plants. Mine that are in the ground, which is most of them, get all the wintere rain there is because I am not going to try to covere them, like I do with the freezes. We are having the longest stretch of freezing weather that I can remember. 7 or 8 nights now, and another to go (tomorrow). We have had isolated colder spells, but much shorter.This one just keep going. Xuling
Good luck! I recall you were none too happy with last winter either. Your reports from last winter inspired me to try A. 'Kissho Kan' and another form of A. isthmensis in the ground, and both made it through this awful freeze undamaged.
How happy I am to her that. They are tough little cookies. I have pulled out 3 very little plants this years, dead from rot. They really were small and I do not seem to do well with little cactus for some reason. I have crammed most of them into planters except for those that look healthy in the ground. Amost all of those that do die from wet roots are the cheap ones I buy at the big box stores. Not that this makes their loss any more pleasant. All of those ordered on line for the most part do well regardless of the weather. Xuling
Our freeze is finally over, the longest one that I can remember. Have had colder nights but not as long as this one lasted. I took off all the covers today, folded and put them away and unfortunately removed 3 rotted plants of decent size: Euphorbia obesa, Mamm. laui fa. subducta and Leuchtenbergia principis (which always looked bad from the first. I bought two at K Mart and the other is looking better but is is a pot and under cover of the front porch.) Xuling
My Leuchtenbergia principis made it through 20 degree temps for 5 nights planted under a shrub in my yard without covering. I was so happy because I forgot it was out there and didn't cover it. Also a Mammalaria near it.
Today in pulling out dead leaves at the bottom of some Agaves I found three more dead plants. I am sure from wet roots. So that makes about 10 in three days. I guess that is why I have established such long wish lists on some of the nursery sites. And tyhere are two or 3 more plants that I anm pretty sure are dead but they are so wonderfu I am waiting until they rot more or hopefully show some life in the springtime. Xuling