Quick answer: A small catnip garden fits well in a townhouse dining nook if it gets several hours of light and sits where you can control access. Build a pine plywood planter with drainage, grow catnip in pots inside it, and offer cuttings rather than open grazing. ASPCA lists catnip as toxic to cats because it can cause vomiting and diarrhoea, so keep portions small.
Many cats love catnip, and a fresh plant gives them a stronger scent than dried flakes. Townhouses often have a dining nook with a good window, which makes it a natural spot for a small herb planter.
This guide walks through a pine plywood planter build, growing tips and the safety facts worth knowing before you start. For more on planning a cat-safe indoor garden, see our cat-safe plants and indoor garden hub.
What ASPCA Says About Catnip
It surprises many owners, but the ASPCA plant database lists catnip as toxic to cats. Its entry notes that many cats love catnip, but it can cause vomiting and diarrhoea, and that it makes some cats sedated and others stimulated.
That does not mean you must avoid it. It means a catnip garden should be a controlled treat: grown out of reach, with small cuttings offered by hand, rather than a plant your cat can graze on freely.
Not Every Cat Responds to Catnip
A 2017 study published in BMC Veterinary Research tested catnip, silver vine, Tatarian honeysuckle and valerian on 100 domestic cats. It found that one in three cats did not respond to catnip, while almost 80% responded to silver vine and about half to Tatarian honeysuckle and valerian root.
If your cat ignores catnip, a pot of silver vine or a few dried silver vine sticks may be worth trying. Our catnip and silver vine windowsill garden covers growing both.
Planning the Catnip Garden for a Dining Nook
Catnip likes bright light. A window that gets several hours of sun a day is ideal; a north-facing window may need a small grow light. Measure the windowsill or the floor space beside the window before building.
- Light: several hours of direct or bright light a day
- Height: planter base above cat reach, or with a lid
- Drainage: pots with holes, sitting in a tray
- Space: clear of chair legs and the walkway
- Access: easy for you to cut stems and water
In a dining nook, keep the planter away from the table so soil and leaves do not end up near food.
Pine Plywood Planter: Materials
| Item | Size or amount | Purpose |
|---|---|---|
| Pine plywood 12 mm | One sheet cut to size | Box sides and base |
| Wood screws | About 20, 30 mm | Joining panels |
| Plastic plant tray | Fits inside the box | Catches water |
| Pots with drainage | 2 to 4, 12 to 15 cm | Hold the plants |
| Water-based sealant | Small tin | Protects the wood |
| Mesh or slatted lid | Optional | Keeps cats out of the soil |
Pine plywood is light, easy to cut and cheap. Seal it inside and out with a water-based finish and let it cure fully before adding plants.
Pine Plywood Planter: Build Steps
- Cut a base and four sides to fit your tray with a 1 cm gap
- Pre-drill and screw the sides to the base
- Sand all edges and corners smooth
- Apply sealant and leave it to cure as the tin directs
- Fit the plastic tray inside
- Add pots, never soil directly into the wood
- Optionally hinge a slatted lid so you can open it for cuttings
Keeping plants in pots means you can swap or remove one quickly, and the wood stays dry. If you need a tool list, see our beginner tool kit buyer's guide.
Growing Catnip and Friends Indoors
Sow catnip seeds on the surface of moist compost and press them in lightly. Keep the pots warm and bright. Thin seedlings once they have a few leaves, and pinch out the tops to keep plants bushy.
Cat grass is another popular addition to the planter. Our indoor cat grass tray method explains how to grow it in a few days.
- Water when the top of the soil feels dry
- Turn pots weekly so stems grow evenly
- Cut back flowering stems to encourage leaves
- Re-sow every few months for a steady supply
Offering Catnip Safely
Cut a sprig and crush the leaves lightly in your hand to release the scent. Offer it on the floor or rub it on a scratcher or toy. Remove what is left after the session.
International Cat Care suggests providing a pinch of catnip now and then, or storing toys in a bag with catnip to keep cats interested. Keeping catnip occasional also helps it stay exciting.
If your cat vomits or has diarrhoea after eating catnip, stop offering it and speak to your vet.
Plants to Keep Out of the Nook
A herb corner can tempt you to add more plants, so check each one first. The US Food and Drug Administration warns that lilies in the true lily and daylily families are very dangerous for cats, and that the whole plant, including pollen and vase water, is toxic. Eating a small amount can cause kidney failure.
Never put lilies or lily bouquets in the dining nook, even on the table. Check our cat-safe houseplants list for US apartments and our guide to swapping toxic plants for lookalikes before adding anything else.
Keeping Cats Out of the Soil
A planter at cat height becomes a litter tray or a digging pit for some cats. A slatted lid, a layer of large pebbles on the soil surface or mesh cut to fit around stems all help.
Give your cat a legitimate alternative nearby: a scratcher rubbed with crushed catnip or a small cat grass pot it is allowed to chew. Redirecting is easier than banning.
Spreading Plants Across Townhouse Floors
Townhouses usually spread rooms across floors. If the dining nook is on the main floor, put the catnip garden there and keep cat grass on another floor, so your cat has a reason to move around.
| Floor | Plant | Access |
|---|---|---|
| Main floor nook | Catnip and silver vine | Lidded planter, cuttings by hand |
| Upper floor | Cat grass | Open pot your cat may chew |
| Lower floor | No plants near litter area | Keep litter and plants separate |
If your townhouse has stairs with a window landing, that can also be a bright spot for a second pot, out of the dining area.
Watering and Light Without Mess
Indoor catnip dislikes waterlogged roots, so water little and often rather than flooding the pots. Empty the tray an hour after watering, so the wood stays dry and the planter does not smell damp near the dining table.
If light is limited, a small clip-on grow light on a timer gives a steady day length. Set it to switch off in the evening so the nook stays calm for meals. Rotate pots each week so stems do not lean toward the window.
- Check soil daily with a finger
- Water at the base, not over the leaves
- Wipe drips off the plywood straight away
- Refresh the sealant once a year if it wears
Seasonal Care
Catnip grows quickly in spring and summer and slows down in winter. Move the planter closer to the window or add a grow light in darker months. Dry extra cuttings by hanging them upside down in a dark, airy spot, then store the leaves in a sealed jar.
For more seasonal ideas, browse our seasonal cat DIY hub.
Indoor Catnip Garden FAQs
Does ASPCA consider catnip toxic?
The ASPCA lists catnip as toxic to cats, noting it can cause vomiting and diarrhoea and makes some cats sedated and others stimulated. Many cats enjoy it in small amounts, so offer cuttings occasionally by hand and keep the plant itself out of reach to stop free grazing.
Why does my cat ignore catnip?
Not every cat responds. A 2017 study in BMC Veterinary Research found that one in three cats did not react to catnip, while almost 80% responded to silver vine. If your cat ignores catnip, silver vine or valerian root may be worth trying instead.
How do I stop my cat digging in the catnip planter?
Fit a slatted lid or mesh around the stems, cover the soil with large pebbles, and keep the planter raised. Offer a pot of cat grass the cat may chew and a scratcher rubbed with crushed catnip nearby, so it has an allowed alternative.
Can I grow catnip indoors all year?
Yes, with enough light. Catnip grows fastest in spring and summer and slows in winter, so move the planter closer to a bright window or add a small grow light in dark months. Re-sow every few months and dry extra cuttings in a sealed jar.
