My split leaf philodendron leaves keep yellowing. I have fed them and used insecticide. I don\'t know what I am doing wrong. Can you please give me some suggestions.
This could be sunscald from too much direct sunlight. Split-leaf philodendrons usually grow up trees in tropical forests and receive shade from their host tree or their grown as tropical houseplants out of direct sunlight. The light level in the picture seems pretty intense. This article may help: