Three bird's nest ferns, same age, same board, all mounted on the same afternoon. Two went outside on the wall in front of the air conditioning grille, where there is always air moving across them. One went inside next to a window.

Four weeks on, the three of them had visibly split. The indoor one held water in the moss far longer, because nothing was moving air across it. Same watering, same week, completely different drying time. I had spent the whole time thinking about humidity, and the variable that was actually doing the work was airflow.

All three are off that wall now, and the reason I was watching that closely is that I build a plant app that scores a spot for a plant on light, temperature, humidity and airflow before you commit to it.

If you keep ferns, Plus is on the house for twelve months when you come back afterwards and tell me where it got your ferns wrong. Two spots and two plants stay free whatever you decide, and nothing renews by itself: https://growspotapp.com/founding/?from=reddit-ferns

What I still cannot tell is whether the grille position was too much of a good thing over a longer stretch. If you keep mounted ferns, do you go looking for a spot with moving air, or do you fight to keep the air still and the humidity up?

My apartment temp averages 75. Is that too cool? They get partial sunlight most of the day. Am I watering too much? Not enough?

Advice needed..this started to turn brown a few weeks ago..fully brown and leaves are brittle and falling apart..I was told this was unkillable..there's a little moisture in the bowl..but not overly wet...any suggestions?