In the spring/summer, we often plant so-called 'cat grass' in planters outside, and then bring them inside for our cats to nibble on and consume.
The seeds you can use to grow are: Wheatgrass, Barley Grass, Oat Grass, Rye grass, and Alfalfa Grass.
Now some cats have a preference for some varieties of grass, but all are safe for them.
Cats need grass for a few reasons.
It's good for their digestion, ( reducing hairballs, easing constipation) as 'cat grass' contains Fibre, Folic Acid, Antioxidants, Chlorophyll, Vitamins and Minerals.
And, as we all know, some cats just like to chew!
The down-side ( for humans) is that sometimes, eating 'cat grass' will result in a cat vomiting it back up, ( like they were in the wild), but take comfort in knowing that your cat will then feel better, stride contentedly off, and leave the rest to you!