Follow the directions of your cat grass kit, which will look a bit like the following, according to PetMD:

Tummy trouble - Some theories suggest that cat grass helps your cat to regurgitate hairballs, getting rid of the fur from grooming that clogs their digestive tract. The grass should last for around two weeks of munching. Afterwards, you will want to replace it with a new pot, or scrap the whole thing altogether if your cat isn't fussed. The only way to tell is to try! Ensure your cat’s diet is complete and nutritious with our selection of cat specialty diets & supplements. Spray the soil to be keep it moist and do this twice day 12 hours apart if possible – little and often is always best

What is Cat Grass?

If your cat appears to be devouring your cat grass at every opportunity, you may want to consult your vet to determine if additional changes need to be made to your cat’s diet. Fill up your spray bottle with cool water after each watering. This means next time you water your grass you will spray it with water at room temperature and not cold water from your tap When you first place your seed in your pots you can keep them in the airing cupboard for the first 24 hours or until the seeds sprout. After they have sprouted, they will need sunlight.

Try and keep your cat grass off the floor – Your cat grass needs warmth to grow and as heat rises think about where in your house – vertically – your cat grass will grow best Cat grass is rich in fiber and great for digestive health. Cat grass has shown benefits in hairball reduction and is rich in many vitamins and other beneficial nutrients. Cat grass also contains chlorophyll, which has a wide variety of health benefits regarding oxygen levels in the bloodstream itself in addition to freshening their breath.The grass will last between a week and three weeks if you give it natural light and daily watering.

Cat Grass loves sunlight but direct sunlight is not always the best. Make sure you cat grass has plenty of indirect sunlight You can tell your seeds have sprouted as they will have growth at both ends of the seed or with Grow Your Own kits you will see the shoots coming through the soil After about 10 to 14 days after sprouting, the grass should be about 4 inches tall, and you can give your cat access to the grass. Your cat can eat directly from the container.

Should your cat have constant access?

It’s important to note here that cat grass is not catnip, which is a member of the mint family. The difference between catnip and cat grass is that catnip produces a euphoric, behavioral effect in cats.