Indoor cats can have a patch of their own greenery without any outdoor risk, and growing it is easier than most owners expect. After growing a range of cat grass kits side by side, Katelynn Sobus of Cats.com reported that most of the grasses germinated about equally well and cats showed little preference between them. The real differences were in setup, mess, how long the grass lasted, and how well the planter stood up to an enthusiastic eater. That makes the choice of container more important than the choice of seed.
Why a cat-grass pot is worth having
Sobus keeps indoor cats and wanted to give them varied experiences without unsupervised outdoor access. Cat grass fits that goal. It is a bit of greenery that belongs to the cat, and it can double as an enrichment activity.
If you also share your home with decorative plants, a dedicated pot gives your cat an obvious, approved thing to chew. It does not replace checking your other plants. Ask your vet which of your houseplants are unsafe for cats, and move anything questionable out of reach.
How easy is it to grow?
According to Cats.com, you do not need a green thumb. With a soil kit, you plant the seeds and water them in. With a hydroponic kit, you scatter the seeds in a tray, add water, and wait.
A few habits help the grass last longer:
- Keep the growing medium moist, but not soaked. Cats.com noted that one kit developed mold, possibly from overwatering.
- Trim the grass once it gets tall, which may encourage it to keep growing.
- With hydroponic trays, change the water every day to keep it clean and stop algae building up.
Six kit styles compared
Cats.com's round-up covered several formats. Its top pick was the Lykoclean Hydroponic Cat Grass Kit, chosen because the grass grew easily and there was no messy soil. The table below sets out what the review found for each style, plus a suggestion on who it suits.
| Kit style | What the review liked | Who it may suit |
|---|---|---|
| Hydroponic tray (Lykoclean, top pick) | Simple setup, no soil, fast-growing and long-lived grass, five seed packets | Owners who want a clean, low-effort start and will remember to change the water |
| Hemp mat in a wide bamboo tray | Cleaner to handle than soil or coconut coir; the wide tray helps prevent spills | Beginners, especially anyone starting out with houseplants |
| Wide wooden planter with seed and substrate packets | Sturdy and hard for cats to knock over; four packets included | Cats that dig, tug or lean hard into the pot |
| Pre-planted kit (vermiculite and Plantagel mix) | Just add water; holds moisture and needs infrequent watering; lived longest of all with repeat waterings | Forgetful waterers who want grass that lasts |
| Live, ready-to-eat plant | Arrived in excellent condition with care and troubleshooting guides; Stay-Fresh bag for refrigerating | Anyone who does not want to grow from seed at all |
| Small cups mounted out of the way | Free up table and windowsill space; cats seemed to prefer eating from an elevated planter; supplies for two refills | Small homes, or households where the cat treats every flat surface as a toy |
| Cat fountain with grass-growing station | Holds up to 10 liters of water, which is filtered and oxygenated; grass is watered automatically as the fountain flushes each day | Owners who want a combined water and grass setup |
The trade-offs to know about
Even the top pick has downsides. The Lykoclean container is small and light, so a cat tugging at the grass could tip it, and it may slide on hard floors. The reviewer found that the water weighed it down and she had no spills, but a heavy, determined cat might still manage one.
The kit also comes with scissors that have no safety lock or cover. Cats.com advises storing them carefully, out of reach of children and pets.
One kit did not make the list at all. The Cat Ladies cat grass kit had very low germination, mold, and too little substrate to fill the planter. The reviewer allowed that bad luck or overwatering may have played a part, but a second seed packet grew just as poorly. If a kit fails twice, it is reasonable to switch brands rather than keep trying.
What this means for you
Use these steps to pick and set up a kit:
- Match the pot to your cat's manners. If your cat is gentle, a small hydroponic tray is fine. If your cat pulls at plants or bats things off surfaces, a wide, heavy planter is the safer choice.
- Match the kit to your habits. If you forget chores, consider a pre-planted kit with a moisture-holding mix. If daily water changes are no trouble, hydroponic works well.
- Try height. Cats.com's cats seemed to like eating from an elevated planter. If yours ignores a pot on the floor, try a higher spot, as long as it is stable.
- Keep the grass trimmed and the medium damp. Check hydroponic water daily and look out for mold in soil kits.
- Store the extras safely. Put away scissors and seed packets so neither pets nor children can reach them.
- Review your other plants. Ask your vet which houseplants in your home are unsafe for cats, and keep those out of reach.
Ways to make the grass more fun
Once the grass is long enough to trim, you may have more than your cat can eat. Sobus used her clippings in a few ways you can copy:
- Serve a few blades alongside a meal.
- Bury treats or catnip in the grass so your cat has to search.
- Add clippings to a dig box. Hers is a shipping box filled with toys, treats and catnip.
If your cat shows no interest, catnip may help. Sobus sprayed a cat-safe catnip spray directly on the plants, and her cats came back to the grass later that day. She recommends that only for larger, sturdier planters. With a small hydroponic kit, clip the grass and offer it in a bowl with catnip, treats or food.
FAQ
Is cat grass hard to grow indoors?
No. Cats.com says it is as simple as planting seeds and watering them, or filling a hydroponic tray with water. Keep the medium moist, trim the grass when it gets tall, and change hydroponic water daily.
What if my cat ignores the grass?
Try a cat-safe catnip spray on a sturdy planter, or clip the grass and offer it with catnip, treats or food in a bowl. You could also try a higher, stable spot, since the reviewer's cats seemed to prefer elevated planters.
Do I need to buy a particular type of grass seed?
Probably not. In the Cats.com tests, most of the grasses showed little difference in germination or cat preference. The container, the mess, and how long the grass lives mattered more. If you have a health question about your cat's diet or plant chewing, ask your vet.
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Sources
Photo: Helena Jankovičová Kováčová / Pexels
I'm an Italian creator who builds apps, games and websites. I run PetCare Updates with the help of AI tools: every article starts from the sources linked above, and I check what goes out. I'm not a doctor, a lawyer or a financial adviser. Spotted a mistake or have an idea? Write to me.
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