Since Cat Grass is actually wheatgrass sprouts, it helps to think of it as produce and care for it in a similar way. The average lifespan of wheatgrass is about  2 to 3 weeks, depending on a variety of factors like the temperature, humidity, etc.  The good news is there are things you can do to extend the life, like storing the pots in the refrigerator when your pet is napping or out on a play-date.  Keeping it trimmed helps, too, and you can sprinkle the trimmed ends on your pets’ food.  Transplanting to a larger pot will not extend its viability.

Soaking the cat grass pot in an inch of water for about an hour twice per week should suffice.

Gnats or fruit flies are everywhere and are naturally attracted by the moisture in the plants, similar to other produce sitting out on your kitchen counter.  They are a harmless nuisance so please do not spray any insecticide on the Cat Grass!  They can be easily removed by taking the plants outside and giving them a few brisk shakes. Once the gnats have flown off you can place the plants in the refrigerator briefly, which will help prevent them from returning.

Also, make sure you’re not over-watering or allowing the pots of Cat Grass to remain in standing water, as that will only attract more gnats. Remember, soaking the pot in an inch of water for about an hour twice per week should suffice.

This is another humidity issue. The type of mold that grows on Cat Grass, usually seen at the bottom of the blades close to the roots, is completely harmless. One often sees this type of mold on organic produce – and you can just rinse it off under the tap, then allow the plant to get some fresh air and all will be well. 

Occasionally, if not noticed right away, the mold can turn from white or gray to black. This black mold is harder to rinse off, and it can start to smell bad.  When this happens it’s best to just dispose of the affected pots.

The first (and most common) cause of yellowing relates to watering: if you’re looking at limp, slightly brownish-around-the edges pale green or yellow blades, most likely the plant is getting too much water and heat and it’s simply rotting. Depending on the severity, you may be able to salvage the Cat Grass by setting it someplace it can get fresh, dry air to allow it to dry out. It’s worth a try, but it may be too late if the roots are rotted. 

The second most common cause of yellowing is lack of light.  If you’re seeing a bright yellow starting down by the roots, that’s the problem. This is commonly seen when you first open a shipment of the Cat Grass 3-Pack for Home Delivery.  It is easily remedied by setting the pot(s) in bright but indirect sunlight for a few hours. 

The third possibility is that your Cat Grass is reaching the end of its life and should be replaced.