22+ Cactus Corking Vs Rot. Cactus corking, which is perfectly healthy though unattractive, is not dangerous for your plant. To see if a euphorbia is doing fine, stick a pin in it.
There is nothing to treat.
Rot post by cactushobbyman » sat sep 21, 2013 10:37 pm maybe not the best of pic's, but i got this one at lowe's because it had straw flowers on it and it needed to be saved. Possibly something akin to dry rot or one of the simple wood decomposers. If it's corking from the top, there is another problem. Rot post by cactushobbyman » sat sep 21, 2013 10:37 pm maybe not the best of pic's, but i got this one at lowe's because it had straw flowers on it and it needed to be saved.