I have had this Birkin Philodendron for about six weeks. It started out looking great, but this white leaf got a brown spot on it. The brown spot has grown. And now I noticed a brand new leaf that is just starting to come out has brown on it as well. I have been careful (I thought) not to overwater her. She is planted in the same pot as a lipstick plant, which seems to be doing great. What the heck is going on here? 😢 About 18 feet from a big west facing window. But grow light is on 14 hours/day. Great drainage.

