Did you know that lilies, including those that come from the supermarket, are poisonous to cats? A cat has only to brush against one of the flowers and then lick the pollen off its fur, to become sick within minutes. Progressive symptoms that appear are blindness, renal failure and paralysis. The cat dies within hours.
So if you must buy lilies, keep them well away from your feline. For cats that like to nibble plants, provide them with a pot of the cocksfoot grass that is available in seed form free from Swale Cats Protection. (Please include a SAE if writing in.)