Q. I have a plant I bought years ago, labeled simply "vanilla plant." It is leafy and propagates by seed. In Spring it sends up 3-4-foot stems
Well, not sure what you plant is without a picture. So here is a picture https://www.google.com/search?q=vanilla+plant+common+name+for&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwj8t9Py7PfWAhWo7YMKHYN1AUoQsAQIjAE&biw=1280&bih=617#imgrc=_lZRq5JCtdSJaM:
Also, please send a picture of your plant to email@example.com so we can idenify it and give proper information about your cats favorite plant.
NYBG Plant Information Service