Friend is giving me this plant come Christmas time when she comes home, but it has suddenly developed brown spots. East facing window, distilled tap water when the top couple inches of soil are dry, also has indirect grow light exposure for ~9hrs. Not sure how long she's had it, but it's never been reported as she's "scared to F it up" now that it's coming to me. The leaf pushing out is the 4th or 5th this year so she's under the impression it's mostly happy.
She noted that she misted a Christmas cactus with hydrogen peroxide nearby around the time the spots showed up. I have 0 idea why she did that and/or if it was just a coincidence.
Any thoughts appreciated!
by KittysaurusRex7221