At least I think it is a euphorbia. Overwater, underwater? I have already lost one stalk of it. I have had it a long time in a bronze tinted window facing slightly west of due south. It was in the most westerly corner.
Hi Gypsy, welcome to the forum. These columnar Euphorbias love the sun, so your spot sounds perfect, but this time of year our houses are getting pretty chilly at night, yours too? These will do fine in the lower winter temps, but they sure need a lot less water to do it, or else the stems rot off at the bases. Make sure also that you never let them sit in water. I can't quite tell from the picture, but do you recall what kind of soil you have them in and how long they've been there? :)
Espenshade's where I bought it said not enough water. :( It has been in that pot for a while, probably in cactus soil. It feels very dry to me. It might get down to like 58 at night, possibly, but is nothing new. it feels dry & it is in a corner where 2 hot water registers for heat meet. Maybe I should repot it? It has not stood in water that I ever knew of. the pot has a saucer in the bottom.
Exactly what is the problem? The gray-black area on a stem in the left picture? Did you look inside the lost stem? It would be interesting to know what it looked like. I collect cacti, not Euphorbia, but it does not look underwatered to me.
The stalk that died dried up & was hard like a skeleton. The areas are hard, not soft. I had this a long time :( It may sound stupid, but my entire ecosystem in here is messed up because we had to cut down 2 giant oak trees that were too close to the house. The house has deep overhangs & those big windows are tinted bronze, & are aimed slightly West of South. So it is very lighted, but also sort of screened by the color of the windows. Between a naughty kitten always digging & the removal of the trees, my plants are not the same. I thought I would try watering them every 2 weeks.
