We Get Questions from people about their Euphorbias.
I am kicking myself that I was so blind to have probably missed this entire blighted side on this cactus before I bought it, just a few weeks ago. What is growing on it? Mold? Rot? Plaque? (I’ll break out a toothbrush! :-)) What can I do about it? I’ve attached a sad picture.
Thanks for any words of wisdom-
You “cactus” is actually a Euphorbia, a cool succulent from Africa. It
actually looks more like sunburn, so I don’t think your blight is an
infection. My guess is your plant was greenhouse grown, under shady
conditions and when you brought it home the “north” side got turned
towards hot sun and the plant burned, just like we do on our first spring
trip to the beach…. The burn will eventually scar over and turn to
bark and the plant will keep growing, but it will always have a scar.