Hi guys - I'm a very new philodendron parent and trying to do the research, my sister is a plant momma so I've been asking her for a lot of advice as well but I'm starting to question some of that advice. She said they really like to be root-bound in small plastic pots, but I'm reading just the opposite - Larger clay or terracotta pots. My PPP is starting to yellow a bit too, I'm thinking she needs a new pot. Any other advice?