Cactus SOS!
Hi— I have had this cactus (though careful online searching, I believe it is a "<i>Echinopsis pachanoi f. cristata" </i>or a "<i>Crested San Pedro Cactus</i>" for nearly 2 years. About 4 months ago, he (Apollo) began to develop this crusty white material on his side? It has now spread. He is also leaning quite a bit. I have no idea what is going on— have been caring for a and watering as normal— and I have not changed sunlight. Any help appreciated! If I lose this guy I will be heartbroken! <br><br>As I write this, I realize that I repotted him in July, which was shortly before this appeared. Could this have had anything to do with it? Is there anything I can do now? 
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    Paris Lalicata Hi Maggie! To me this looks like the natural aging process of some cacti called "corking"!
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      maggie Hi [286271,Paris Lalicata] —

      Okay, thanks so much! Should I be concerned at all that it is only at the top of the plant and not at all at the base?