Our cat, Patches, is an indoor cat. We do allow her to accompany us outside to our front porch. We keep a close eye on her, though, so she doesn’t wander off or go out on the street. When Patches is outside her favorite pastime is to prance down the front steps onto the sidewalk, where she nibbles on grass. The ground has been covered with snow since early January. We thought Patches might be missing her daily grass intake, so we began to grow cat grass indoors for her.
This is one of several articles that I found on the Internet that discusses questions you might have about cat grass, for example: Is grass good for cats? Is it necessary? and Why do they eat it?