Even though it is Spring, many parts of the world are still wrapped in Winter. And many cats, who live in warmer climates, are indoor cats, who don’t have access to the great outdoors, or the opportunity to eat grass. Dr. Foster has a blog on this topic, which begins, “Although cats are carnivores, they seem to have an occasional craving for live green plants. This may be because in the wild, carnivores ingest plant materials in the digestive tract contents of their prey.” That makes sense to me, but then anything that follows the natural way, generally does.
So if your cat is stuck indoors and doesn’t go out on a leash, perhaps you’ll find the following info-graphic useful (btw, if you don’t want to round up all the bits, etc., they sell kits for this, or perhaps you can find a pot already growing at a gardening center.)