Light is certainly important with the fiddle leaf,
@WillC. After all, these are trees and in nature they grow in full sun! I am surprised that your plants do well in a north-facing window. This affords them very poor-quality light (minimal lumens). I am in the deep south, and though the north-light would be even stronger here than in NYC, I would never even consider putting any of my fiddles in that kind of light conditions. But since it seems to work where you are, apparently I am wrong in my thinking.
