Took me 5 weeks to figure out my monstera's yellow leaves were from tap water, not light
I moved my monstera to 4 different windows in my apartment in Phoenix over 5 weeks trying to fix the yellow leaves, and nothing helped at all. Then a guy at my local nursery asked what kind of water I use, and it turns out the chlorine in Phoenix tap water was the whole problem. Has anyone else had a plant perk up just from switching to filtered water?
The same thing happened to me but with the hard water here leaving crust on the soil, not just the yellow leaves. Switching to filtered fixed the leaves but then I had to flush the pot for like 10 minutes to wash out all the salt build up from months of tap. So if your plant perks up but stalls after a week, the soil itself is still holding all that junk and needs a good rinse.