How To Grow Catnip Grass – The Ultimate DIY Guide
To grow catnip grass (Nepeta cataria), plant seeds in well-draining soil with a pH between 6.0 and 7.0. Provide full sun and water only when the top inch of soil feels dry to the touch.
For the best results, sow seeds in early spring or late fall, and pinch back the stems regularly to encourage a bushy, “grassy” texture that your cats will love.
Do you want to transform your backyard into a sensory paradise for your feline friends? You are not alone, as many homeowners seek natural ways to entertain their pets while maintaining a beautiful landscape. Learning how to grow catnip grass is the perfect solution for creating a safe, aromatic, and engaging space for your cats.
I promise that by following this guide, you will master the art of cultivating a lush, potent patch of catnip that thrives year-round. We will cover everything from soil preparation and seed starting to pruning techniques and pest management for a professional-grade result.
In this article, we will explore the essential environmental conditions catnip requires and provide a step-by-step framework for planting. We will also address common mistakes and offer pro-level landscaping tips to integrate this herb seamlessly into your garden beds.
Understanding the Difference: Catnip vs. Cat Grass
Before we dig into the soil, we must clarify a common point of confusion among pet owners. While people often search for “catnip grass,” catnip (Nepeta cataria) is actually a perennial herb in the mint family. It produces aromatic oils that trigger a euphoric response in most cats.
On the other hand, “cat grass” usually refers to cereal grains like oats, barley, or wheat. These grasses are grown for cats to chew on to aid digestion. When you learn how to grow catnip grass, you are essentially growing a dense, low-growing patch of the catnip herb to serve as a soft, interactive groundcover.
Catnip features heart-shaped, scalloped leaves and small white or purple flowers. It is much hardier than cereal grasses and will return year after year in USDA zones 3 through 9. Understanding this distinction ensures you choose the right seeds for your specific landscaping goals.
Selecting the Ideal Location for Your Feline Patch
The success of your catnip patch depends heavily on the location you choose. Catnip is a sun-loving plant that requires at least six hours of direct sunlight daily. While it can tolerate partial shade, the essential oil production—which cats love—is most potent in full sun.
Drainage is the next critical factor for your site selection. Catnip roots are susceptible to root rot if they sit in waterlogged soil for extended periods. Avoid low-lying areas of your lawn where water tends to pool after a heavy rainstorm.
Consider the “traffic” your catnip patch will receive from local felines. If you plant it near delicate flowers, excited cats may accidentally trample your prize-winning roses. Place your catnip in a dedicated “cat zone” or use it as a sturdy border plant where its spread is welcomed.
Best Practices for How to Grow Catnip Grass Indoors and Out
Whether you have a sprawling backyard or a small apartment balcony, you can successfully cultivate this plant. Growing catnip indoors allows for year-round access, while outdoor planting provides a more robust, expansive “grass-like” patch for roaming pets.
For indoor growth, choose a wide, shallow pot to mimic a grassy area. Use a high-quality potting mix enriched with perlite to ensure maximum aeration. Place the container on a sunny windowsill, preferably one facing south, to give the plant the light energy it needs.
Outdoor gardeners should prepare the site by removing all existing weeds and turfgrass. Use a garden fork to loosen the soil to a depth of eight inches. This allows the roots to penetrate deeply, making the plant more drought-tolerant once it reaches maturity.
Choosing the Right Cultivars
Not all catnip is created equal when you are designing a feline landscape. The standard Nepeta cataria is the most common and effective for cats. However, you might also consider Nepeta cataria ‘Citriodora’, which has a pleasant lemon scent that acts as a natural mosquito repellent.
If you want a more decorative look, look for “Walker’s Low” or other catmint varieties. While these are beautiful and attract pollinators, they contain less nepetalactone (the active ingredient cats crave). Stick to the species plant if your primary goal is feline entertainment.
Preparing the Soil for Maximum Potency
Catnip is not a heavy feeder, but it does appreciate soil that is rich in organic matter. Before planting, perform a simple soil test to check your pH levels. Catnip thrives in a slightly acidic to neutral range, ideally between 6.0 and 7.0.
If your soil is heavy clay, mix in several inches of compost or well-rotted manure to improve the structure. For sandy soils, organic matter helps retain just enough moisture to keep the plants hydrated without becoming soggy. Avoid high-nitrogen fertilizers, as these can lead to rapid growth but lower oil concentrations.
A balanced NPK ratio, such as 5-10-5, is generally sufficient for herbs. Apply a light layer of organic mulch, such as shredded bark or straw, around the base of the plants. This helps regulate soil temperature and prevents soil from splashing onto the leaves during watering.
Step-by-Step Guide: Sowing Seeds and Transplanting
Starting from seed is the most cost-effective way to learn how to grow catnip grass in large quantities. You can sow seeds directly into the garden after the last frost or start them indoors six weeks earlier for a head start.
- Stratification: Catnip seeds benefit from a period of cold. Place the seed packet in the refrigerator for one week before planting to improve germination rates.
- Surface Sowing: Scatter the seeds over the prepared soil. Do not bury them deeply; they need light to germinate. A light dusting of fine soil or vermiculite is enough.
- Moisture Control: Use a spray bottle to mist the soil gently. Keep the surface consistently moist but not saturated until you see green sprouts appearing.
- Thinning: Once the seedlings reach two inches in height, thin them to about 12 to 18 inches apart. This ensures each plant has enough room to spread into a dense mat.
If you are transplanting nursery-bought starts, dig a hole twice as wide as the root ball. Set the plant at the same depth it was in the container. Water thoroughly immediately after transplanting to settle the soil and reduce transplant shock.
Maintenance and Pruning for a “Grassy” Texture
To achieve a look that resembles a thick patch of grass rather than a tall, leggy weed, you must be diligent with pruning. Regular “pinching” is the secret to a bushy, dense growth habit that can withstand a cat’s rolling and pouncing.
When the plant reaches six inches in height, pinch off the top inch of the center stem. This forces the plant to send energy to its side branches. Repeat this process every few weeks throughout the growing season to maintain a low, carpet-like profile.
If the plant begins to flower, you should decide whether you want seeds for next year. Cutting off the flower spikes, a process known as deadheading, encourages the plant to focus on leaf production. If you leave the flowers, be prepared for the plant to self-seed aggressively across your garden.
Watering and Irrigation Needs
Established catnip is remarkably drought-tolerant, but young plants need consistent moisture. Water your catnip patch in the early morning to allow the foliage to dry before the sun gets too hot. This prevents fungal issues and ensures the water reaches the roots where it is needed most.
Check the soil moisture by inserting your finger an inch into the ground. If it feels dry, it is time to water. If it feels moist, wait another day. Overwatering is the most common cause of failure for those learning how to grow catnip grass for the first time.
Safety and Protection for Your Young Plants
One of the biggest challenges in growing catnip is protecting the plants from the very animals you are growing them for. A young catnip seedling cannot survive a five-pound cat rolling on it. You must provide protection until the plant is established and woody enough to handle the attention.
Use a small wire cage or a “cloche” made of chicken wire to cover your new plants. This allows the scent to escape and the plant to grow through the wire, but prevents cats from sitting directly on the crown. Once the patch is a foot wide and several inches thick, you can remove the protection.
Safety is also paramount when it comes to garden chemicals. Never use synthetic pesticides, herbicides, or chemical fertilizers on your catnip. Cats will ingest the plant and rub it into their fur. Stick to organic methods like neem oil or insecticidal soap if you encounter pest problems.
Common Pests and Troubleshooting
While catnip is generally hardy, it can fall victim to a few common garden pests. Spider mites and whiteflies are the most frequent culprits, especially in hot, dry weather. You may notice small yellow spots on the leaves or fine webbing on the undersides.
A strong blast of water from a garden hose is often enough to dislodge these pests. For persistent infestations, organic neem oil is a safe and effective treatment. Always apply these treatments in the evening when the sun is low to avoid burning the leaves.
If you notice the leaves turning yellow and the stems becoming mushy at the base, you likely have root rot. This is usually caused by overwatering or poor drainage. Stop watering immediately and, if possible, transplant the herb to a more elevated or sandy location.
Harvesting and Storing Your Catnip
You can begin harvesting leaves as soon as the plant is six inches tall and established. However, the oils are most concentrated just as the plant begins to flower. For the most potent harvest, cut the stems in the late morning after the dew has dried but before the heat of the day.
To dry your catnip, bundle the stems together and hang them upside down in a cool, dark, and well-ventilated area. Avoid direct sunlight during the drying process, as UV rays can break down the nepetalactone oils. Once the leaves are “cornflake dry,” strip them from the stems.
Store your dried catnip in airtight glass jars or vacuum-sealed bags. Keep the containers in a dark cupboard to preserve the potency. Properly stored catnip can remain effective for up to a year, providing your feline friends with entertainment all through the winter months.
Integrating Catnip Into Your Landscape Design
From a landscaping perspective, catnip is a versatile tool. Its grey-green foliage provides a beautiful contrast to the deep greens of most turfgrass and shrubs. It works excellently as a “soft” edge for walkways or as a filler in rock gardens.
Consider using it as a companion plant in your vegetable garden. The scent of catnip is known to repel aphids, squash bugs, and even some types of beetles. By placing a patch near your collard greens or pumpkins, you create a natural barrier that benefits your entire garden ecosystem.
If you are worried about the plant spreading too far, consider sinking a bottomless plastic bucket into the ground and planting the catnip inside it. This acts as a root barrier, similar to how gardeners manage invasive mint, keeping your feline patch contained to a specific area.
Frequently Asked Questions
Is Catnip Grass the Same as the Catnip Herb?
Yes, when people refer to “catnip grass,” they are usually talking about the Nepeta cataria herb grown in a dense, low-profile patch. It is different from the cereal grasses (oat or wheat) often sold as “cat grass” in pet stores.
Will Growing Catnip Attract Every Stray Cat in the Neighborhood?
It is possible. If you are concerned about stray animals, plant your catnip in the center of your backyard rather than near the street. You can also grow it in hanging baskets or indoor pots to keep the scent contained.
How Do I Stop My Catnip From Taking Over the Whole Garden?
Catnip is a member of the mint family and can be invasive. To control its spread, remove the flower heads before they go to seed and use root barriers or containers to prevent the rhizomes from creeping into other beds.
Can Humans Use Catnip Grass?
Absolutely! Catnip has been used for centuries in herbal teas. It has a mild, minty flavor and is often used to promote relaxation or settle an upset stomach. Just ensure you haven’t used any non-organic treatments on the plant.
Final Thoughts on Growing a Feline Paradise
Learning how to grow catnip grass is a rewarding project that benefits both you and your pets. By focusing on proper soil health, consistent pruning, and organic care, you can create a beautiful, functional addition to your home landscape. Remember to protect your young plants and provide plenty of sunlight for the best results.
Now that you have the expertise, it is time to grab your trowel and start planting. Your cats will thank you for the lush, aromatic retreat you’ve built just for them. Happy gardening!
Taylor pairs an engineer's eye with years of hands-on work in soil, lawns and outdoor machinery. He tests ideas in his own garden, keeps tractors and mowers running himself, and speaks to local horticulture groups. Every Garden Aider guide is written to be practical, accurate and safe to follow.
“To bring life alive, you just need to mix some love with the compost, bedding, and gardening machines.”