I stumbled across your blog while looking for info on a cactus, the euphorbia ammak variegata or golden candelabra. I just got my boyfriend one for Xmas. We live in Southern Nevada, where it gets extremely hot in the summer, he planted it outside with all the other cactus he has, but it has gone all limp and has been ‘sweating’ . We have had extremely cold temps right now, like 26 to 30 degrees at night and think this is most likely the problem. Should we dig it back up and bring it indoors or what would be the best way to take care of it? Thanks so much, and we will be checking out your blog now that we have found it!!
If you are getting down to 26 it has indeed been too cold for an E. Ammak to be outside unprotected. They can take light frosts, but get pretty damaged with real freezes. Either move it in-doors or wrap it with old-style c-9 Xmas lights (the big ones that give off a little bit of heat) and then wrap it lightly in a frost blanket (a spun breathable fabric sold as a season extender at garden centers). If your E. Ammak is “sweating” sap be very careful, as the sap is poisonous and if it gets in your eyes it is a trip to the emergency room! If it has frozen hard it will have tissue damage and may start turning black and rotting, you may need to nurse it through to save it. Keep it dry and warm it up if you can. If rot starts you may need to trim off the infected parts with a knife and then douse the cut parts with hydrogen-peroxide, but again be very careful of the sap, it hurts and cause nasty rashes if it gets on the skin.