Hi. I received this cactus from an online seller and I was wondering if anyone could help me figure out if these brown spots are a normal thing, or scale or another kind of problem.
This cactus is potted in a gritty mix with drainage. It is inside with light from a southwest facing window and a supplemental grow light. I water it about once every 2 weeks, when the soil is completely dry.
Thank you for your help! I am kind of new to this.
by Mundane_Possible5889