Catmint Plants Near Me
Catmint plants near me searches connect gardeners with local nurseries carrying hardy, aromatic Nepeta varieties perfect for borders, pollinator gardens, and low-maintenance landscapes. This guide covers everything from finding reputable sellers to selecting the right cultivar and ensuring long-term success.
Key Takeaways
- Local nurseries offer climate-adapted plants: Plants from nearby growers are already acclimated to your growing conditions and seasonal patterns.
- Multiple catmint varieties suit different needs: From compact ‘Walker’s Low’ to tall ‘Six Hills Giant,’ each cultivar offers unique height, bloom time, and flower color.
- Spring and fall are ideal planting windows: Cooler temperatures reduce transplant shock and give roots time to establish before extreme weather.
- Catmint thrives in full sun with well-draining soil: Six-plus hours of direct sunlight and lean soil produce the strongest stems and most abundant blooms.
- Regular deadheading extends the flowering season: Removing spent blooms encourages a second flush of flowers in late summer.
- Deer and rabbit resistant: The aromatic foliage naturally deters browsing animals, making catmint a reliable choice for unfenced gardens.
- Divide mature clumps every three to four years: Division maintains vigor, prevents center die-out, and provides free plants for expanding your garden.
Quick Answers to Common Questions
What is the best time of year to buy catmint plants?
Spring offers the best selection, but fall planting gives roots a head start before winter. Both work well.
How far apart should I space catmint plants?
Space compact varieties 18-24 inches apart, mid-size 24-30 inches, and tall varieties 30-36 inches apart.
Does catmint come back every year?
Yes, catmint is a hardy perennial that returns reliably in USDA zones 3-8 depending on the variety.
Will catmint attract cats to my garden?
Some cats may show interest, but ornamental catmint contains much less nepetalactone than catnip and rarely causes the same frenzy.
Can I grow catmint in containers?
Absolutely. Choose compact varieties, use well-draining gritty potting mix, and ensure the container has drainage holes.
đŸ“‘ Table of Contents
- Why Gardeners Search for Catmint Plants Near Me
- Understanding Catmint: More Than Just Catnip’s Cousin
- Finding Catmint Plants Near Me: Where to Look
- Choosing the Right Catmint Variety for Your Garden
- How to Evaluate Catmint Plants Before Buying
- Planting Catmint for Long-Term Success
- Ongoing Care: Keeping Catmint Looking Its Best
- Dividing and Propagating Catmint
- Designing with Catmint: Companion Plants and Garden Uses
- Troubleshooting Common Catmint Problems
- Seasonal Catmint Care Calendar
- Buying Catmint Online vs. Local: Making the Right Choice
- Budget-Friendly Tips for Building Your Catmint Collection
- Catmint and Wildlife: Beyond the Pollinators
- Conclusion: Your Catmint Journey Starts Now
Why Gardeners Search for Catmint Plants Near Me
There is something deeply satisfying about walking into a local nursery and selecting plants with your own hands. You can inspect the root system, check for healthy foliage, and ask the staff questions that no website can answer. When you search for catmint plants near me, you are not just looking for a transaction. You are looking for a connection to your local growing community.
Catmint, known botanically as Nepeta, has earned its place as a garden staple across North America. Its aromatic gray-green foliage releases a pleasant minty scent when brushed. The lavender-blue flower spikes bloom for months, attracting bees, butterflies, and hummingbirds. Best of all, it asks for very little in return. Once established, catmint tolerates drought, resists pests, and returns reliably year after year.
But not all catmint is created equal. The variety you choose matters. The source you buy from matters. And the way you plant and care for it determines whether you get a tidy mound of color or a floppy, sprawling mess. This guide walks you through every step of finding, selecting, planting, and maintaining catmint so your garden thrives.
Understanding Catmint: More Than Just Catnip’s Cousin
The Nepeta Genus at a Glance
Catmint belongs to the mint family, Lamiaceae, which includes over 250 species in the Nepeta genus alone. While catnip (Nepeta cataria) is famous for sending felines into euphoria, ornamental catmint varieties contain much less nepetalactone, the compound that affects cats. Your garden catmint may attract curious kitties, but it will not turn your flower bed into a feline playground.
Visual guide about Catmint Plants Near Me
Image source: bhg.com
Most garden catmints are hybrids or selections of Nepeta racemosa, Nepeta nepetella, and Nepeta x faassenii. These species originate from Europe, Asia, and the Mediterranean, regions with hot, dry summers and well-drained soils. That heritage explains why catmint thrives in tough conditions where other perennials struggle.
Key Differences Between Catmint and Catnip
It helps to know the distinction before you shop. Catnip grows two to three feet tall with white flowers spotted with pale purple. It self-seeds aggressively and can become weedy. The foliage is coarser and less ornamental. Catmint, by contrast, forms neat mounds of fine-textured foliage. The flowers are showier, typically lavender-blue, though pink and white cultivars exist. Catmint is clump-forming and well-behaved, staying where you plant it.
Why Catmint Deserves a Spot in Every Garden
Few perennials offer this combination of traits. Long bloom season. Drought tolerance. Deer resistance. Pollinator magnet. Low maintenance. Versatility in design. Catmint works in cottage gardens, formal borders, rock gardens, xeriscapes, and container plantings. It pairs beautifully with roses, covering their bare knees while complementing their blooms. It softens hardscapes like stone walls and pathways. It even works as a ground cover when planted en masse.
Finding Catmint Plants Near Me: Where to Look
Independent Local Nurseries and Garden Centers
Your best bet for quality catmint plants near me is an independent nursery. These businesses grow or source plants suited to your specific climate. The staff often includes certified horticulturists or master gardeners who know which varieties perform best in your area. They can tell you if a particular cultivar struggles with humidity in your region or sails through winter without protection.
Visit in spring when selection peaks. Ask when they receive new shipments. Many nurseries get weekly deliveries during the growing season. Building a relationship with the staff pays off. They will remember your preferences and alert you when special varieties arrive.
Big Box Store Garden Departments
Home improvement chains carry catmint, usually in spring and early summer. The prices are often lower, but the trade-offs are real. Plants may have been shipped from distant growing facilities, stressed by transport, and held in less-than-ideal conditions. Varieties are limited to the most common cultivars like ‘Walker’s Low’ or ‘Cat’s Meow.’ Staff knowledge varies widely.
If you shop big box stores, go early in the week after a fresh delivery. Inspect plants carefully. Avoid any with yellowing leaves, roots circling the pot bottom, or signs of pests. Water them thoroughly when you get home and let them recover in a shaded spot for a few days before planting.
Native Plant Societies and Botanical Garden Sales
Many regions have native plant societies that host seasonal sales. While catmint is not native to North America, these sales often include well-adapted non-natives that support pollinators. Botanical gardens frequently hold member plant sales with unusual varieties you won’t find elsewhere. The plants are typically grown by volunteers or staff who know the material intimately.
Online Retailers with Local Pickup Options
Some online nurseries partner with local garden centers for pickup. You order online, they ship to the partner location, and you collect your plants. This combines the convenience of online selection with the advantage of local pickup. Check if the retailer guarantees plant condition upon pickup.
Farmers Markets and Plant Swaps
Spring farmers markets sometimes feature small-scale growers selling perennials. Plant swaps, often organized by garden clubs or community groups, let you trade divisions from your own garden for new-to-you varieties. These are great for finding heirloom or passalong catmint cultivars that commercial nurseries don’t carry.
Choosing the Right Catmint Variety for Your Garden
Compact Varieties for Small Spaces and Containers
If you garden in a small yard, balcony, or patio, compact catmints are ideal. ‘Kit Cat’ reaches just twelve to eighteen inches tall and wide, with a tight, mounding habit. ‘Cat’s Meow’ forms a neat eighteen-inch mound with dense flower spikes. ‘Purrsian Blue’ stays fourteen to eighteen inches tall but spreads to twenty-four inches, making a beautiful low hedge. These varieties need no staking and look tidy all season.
Mid-Size Workhorses for Borders and Mass Plantings
The most popular catmint, ‘Walker’s Low,’ grows twenty-four to thirty inches tall and wide. Despite the name, it is not low-growing. It earned the Perennial Plant of the Year award in 2007 for good reason. Reliable, floriferous, and tough. ‘Junior Walker’ is a more compact sport at fifteen to eighteen inches. ‘Blue Wonder’ offers intense violet-blue flowers on eighteen-inch plants. These mid-size varieties anchor perennial borders and create stunning drifts when planted in groups of three, five, or seven.
Tall Varieties for Background Planting and Cut Flowers
‘Six Hills Giant’ is the classic tall catmint, reaching thirty-six inches or more. It makes a bold statement at the back of a border. ‘Souvenir d’AndrĂ© Chaudron’ grows thirty to thirty-six inches with large, soft lavender flowers. ‘Dawn to Dusk’ offers pale pink blooms on thirty-inch stems, a lovely contrast to the usual blue. Tall varieties may need staking in rich soil or partial shade. They also make excellent cut flowers, lasting a week in a vase.
Specialty Colors and Forms
Beyond blue, catmint comes in pink and white. ‘Pink Cat’ and ‘Pink Dream’ offer clear pink flowers. ‘Snowflake’ and ‘White Wonder’ bloom pure white. ‘Lemon Catmint’ (Nepeta cataria ‘Citriodora’) has lemon-scented foliage and white flowers with purple spots. ‘Siberian Catmint’ (Nepeta sibirica) blooms later than most, extending the catmint season into fall. Its flowers are a deeper violet-blue.
Matching Variety to Your Growing Conditions
Consider your specific site. Hot, humid summers? Choose varieties bred for heat tolerance like ‘Cat’s Meow’ or ‘Purrsian Blue.’ Cool, short seasons? ‘Walker’s Low’ and ‘Six Hills Giant’ perform well in northern gardens. Heavy clay soil? All catmints prefer drainage, but ‘Walker’s Low’ tolerates heavier soil better than most if you amend with compost and grit. Container growing? Stick with compact varieties and use a gritty, well-draining potting mix.
How to Evaluate Catmint Plants Before Buying
Inspect the Root System
Gently tip the pot and slide the plant out. Healthy roots are white or light tan, firm, and fill the pot without being severely root-bound. A few roots circling the bottom are fine. A solid mass of circling roots means the plant has been in the pot too long. It will struggle to establish. Avoid plants with dark, mushy roots or a sour smell, which indicate root rot.
Check Foliage Quality
Look for gray-green leaves without yellowing, browning, or spotting. The foliage should be aromatic when crushed. Sparse foliage or leggy growth suggests the plant was grown in too much shade or crowded conditions. Some lower leaf yellowing is normal on older growth, but the overall plant should look full and vigorous.
Assess Stem Structure
Stems should be sturdy and upright, not floppy or stretched. Multiple stems emerging from the crown indicate a well-branched plant. A single weak stem suggests poor growing conditions or a young liner that hasn’t filled out. For tall varieties, some staking in the nursery pot is normal, but the plant should stand mostly on its own.
Look for Pests and Disease
Check leaf undersides and stem joints for aphids, spider mites, or whiteflies. Powdery mildew appears as white powdery patches on leaves. Catmint is generally pest-resistant, but stressed plants in crowded nursery conditions can develop issues. Pass on any plant with visible problems.
Verify the Label
Ensure the plant tag matches what you want. Cultivar names matter. ‘Walker’s Low’ and ‘Junior Walker’ are very different sizes. Some nurseries sell generic “catmint” without a cultivar name. These are often seed-grown and variable in height, flower color, and habit. Named cultivars are vegetatively propagated, so every plant is genetically identical to the original selection.
Planting Catmint for Long-Term Success
Timing Your Planting
Spring and fall are the sweet spots. Spring planting gives roots all season to establish before winter. Fall planting takes advantage of warm soil and cool air, with less watering needed. Avoid summer planting in hot climates unless you can water diligently. In cold zones (USDA 3-4), spring is safer so roots establish before the ground freezes.
Site Selection and Preparation
Full sun means six or more hours of direct sunlight. Catmint tolerates light shade but flowers less and grows leggier. Soil must drain well. Catmint hates wet feet, especially in winter. If your soil is heavy clay, amend the planting area with compost and coarse sand or fine gravel. Work it in twelve to eighteen inches deep. A raised bed or berm improves drainage further.
Test drainage by digging a hole twelve inches deep and wide, filling it with water, and timing how long it takes to drain. If water remains after four hours, drainage is poor. Choose a different spot or improve it significantly.
Spacing Guidelines
Space plants according to mature width. Compact varieties: eighteen to twenty-four inches apart. Mid-size: twenty-four to thirty inches. Tall varieties: thirty to thirty-six inches. For a solid mass or hedge, plant at the closer end. For individual specimens with visible form, use wider spacing. Stagger rows in a triangular pattern for the most natural look in mass plantings.
Planting Step by Step
Water the plant thoroughly in its pot an hour before planting. Dig a hole twice as wide as the root ball and the same depth. Loosen the soil at the bottom and sides. Remove the plant from the pot. Gently tease circling roots outward. If severely root-bound, make four vertical cuts an inch deep around the root ball and an X across the bottom.
Place the plant in the hole. The crown (where stems meet roots) should sit at soil level or slightly above, never below. Backfill with native soil mixed with a handful of compost. Firm gently to eliminate air pockets. Water deeply to settle soil. Apply a two-inch layer of mulch, keeping it away from the crown. Gravel mulch works well for catmint, reflecting heat and improving drainage.
Ongoing Care: Keeping Catmint Looking Its Best
Watering Wisely
New plants need regular water for the first growing season. Water deeply once or twice a week, depending on rain and temperature. Check soil moisture two inches down. If dry, water. Established catmint is remarkably drought-tolerant. In most regions, rainfall suffices after year one. Supplemental water during prolonged drought keeps plants blooming, but they will survive without it. Overwatering causes more problems than underwatering.
Fertilizing: Less Is More
Catmint prefers lean soil. Rich soil or heavy fertilizing produces lush, floppy growth with fewer flowers. A light application of compost in spring is plenty. If growth seems weak, use a balanced organic fertilizer at half strength once in early spring. Avoid high-nitrogen fertilizers. They promote foliage at the expense of flowers.
Deadheading for Repeat Blooms
This is the single most impactful maintenance task. After the first flush fades, usually in early summer, shear the entire plant back by one-third to one-half. Use hedge shears or sharp pruners. This removes spent flowers and stimulates fresh growth and a second bloom period. In long-season climates, you may get a third flush if you deadhead again. The plant looks tidier and more compact too.
Managing Floppy Growth
If catmint flops open in the center, it usually means too much shade, too much water, too much fertilizer, or overcrowding. The Chelsea Chop helps prevent this. In late spring, when stems are twelve to eighteen inches tall, cut the whole plant back by half. This delays flowering slightly but produces shorter, sturdier stems that stand upright. You can also chop just the front half of the plant for a staggered bloom effect.
Winter Care
Catmint is hardy to USDA zone 3 or 4 depending on variety. In cold zones, leave the dead foliage standing through winter. It protects the crown and provides habitat for beneficial insects. Cut back to the ground in early spring before new growth emerges. In wet winter climates, ensure excellent drainage. A gravel mulch helps prevent crown rot. Avoid heavy organic mulch mounded over the crown.
Dividing and Propagating Catmint
When and Why to Divide
Divide catmint every three to four years in spring or early fall. Signs it’s time: the center of the clump dies out, flowering decreases, stems become woody, or the plant outgrows its space. Division rejuvenates the plant and gives you free plants for elsewhere or sharing.
Division Step by Step
Water the plant well the day before. Dig around the clump twelve inches out and lift the whole thing. Shake or wash off excess soil to see the root structure. Using a sharp spade, knife, or two forks back-to-back, separate the clump into sections. Each division needs three to five healthy shoots with roots attached. Discard the woody, dead center. Replant divisions immediately at the same depth. Water well and mulch. Keep moist until established.
Other Propagation Methods
Catmint roots easily from softwood cuttings in late spring or early summer. Take four-inch cuttings from non-flowering stems. Remove lower leaves, dip in rooting hormone, and stick in moist perlite or sand. Cover with a plastic bag. Roots form in two to three weeks. Seed propagation is possible but named cultivars won’t come true. Species catmint like Nepeta racemosa grows true from seed.
Designing with Catmint: Companion Plants and Garden Uses
Classic Perennial Pairings
Roses and catmint are the quintessential pairing. Catmint hides rose canes, suppresses weeds, and attracts beneficial insects that prey on rose pests. The blue flowers complement every rose color. Other stellar companions: salvias, coneflowers, black-eyed Susans, ornamental grasses, yarrow, sedum, Russian sage, and lavender. All share similar sun and soil preferences.
Pollinator Garden Design
Plant catmint in drifts of five or more for maximum pollinator appeal. Bees and butterflies forage more efficiently on massed flowers. Include early, mid, and late-season bloomers for continuous nectar. Catmint bridges the gap between spring bulbs and summer perennials. Add a shallow water source and avoid pesticides.
Edging and Pathway Plantings
Compact catmints make fragrant, durable edging along paths. Brushing against them releases scent. They tolerate occasional foot traffic better than most perennials. Plant twelve to eighteen inches from the path edge so mature plants spill over softly without blocking the way.
Container Combinations
Catmint thrives in containers with good drainage. Pair with trailing plants like calibrachoa or verbena and a thriller like purple fountain grass. Use a gritty potting mix: two parts potting soil, one part perlite or pumice, one part coarse sand. Water when the top inch is dry. Fertilize monthly at quarter strength. Overwinter containers in an unheated garage in cold zones.
Slope Stabilization and Erosion Control
Catmint’s fibrous root system holds soil on slopes. Plant in staggered rows on banks too steep to mow. Combine with other spreading perennials like creeping phlox, sedum, or juniper. The foliage slows rainfall impact, and roots bind soil. Once established, it needs no maintenance on difficult terrain.
Troubleshooting Common Catmint Problems
Center Die-Out
The classic catmint issue: a donut-shaped plant with a dead center. This happens when the plant gets too woody and crowded. The fix is division. Dig, discard the dead center, replant vigorous outer sections. Prevent it by dividing every three to four years and avoiding heavy mulch over the crown.
Floppy, Leggy Growth
Causes: too much shade, too much water, too much fertilizer, or overcrowding. Solutions: move to full sun, reduce watering, stop fertilizing, divide crowded plants, or do the Chelsea Chop in late spring. Staking works but looks unnatural. Better to fix the cultural issue.
Powdery Mildew
Appears as white powder on leaves in humid conditions with poor air circulation. Prevent by spacing properly, watering at soil level (not overhead), and choosing resistant varieties like ‘Cat’s Meow.’ Treat with neem oil or potassium bicarbonate spray if caught early. Remove severely affected foliage.
Root Rot
Caused by poorly drained soil, especially in winter. Symptoms: wilting despite moist soil, yellowing leaves, blackened roots. Prevention is everything: plant in well-drained soil, amend heavy clay, use raised beds, avoid low spots. Once root rot sets in, the plant rarely recovers. Remove and replace in a better location.
Aphids and Spider Mites
Rare on healthy catmint in the ground. More common on stressed or container plants. Blast off with a strong water spray. Insecticidal soap or neem oil for persistent infestations. Encourage ladybugs and lacewings by avoiding broad-spectrum insecticides.
Seasonal Catmint Care Calendar
Early Spring (March-April)
Cut back last year’s dead stems to the ground. Apply a light compost top-dressing. Divide overgrown clumps. Plant new catmint as soil becomes workable. Check drainage after winter rains.
Late Spring (May-June)
Perform the Chelsea Chop if desired. Watch for first flower buds. Water new plantings regularly. Mulch with gravel or light organic mulch. Scout for pests.
Early Summer (June-July)
First flush peaks. Enjoy the pollinator show. Deadhead or shear back after bloom fades. Water during dry spells. Take cuttings for propagation.
Mid to Late Summer (August-September)
Second flush blooms. Continue deadheading spent spikes. Reduce watering as plants establish. Plan fall division if needed. Order new varieties for fall planting.
Fall (October-November)
Plant or divide in early fall. Stop fertilizing. Reduce watering. Leave foliage standing for winter. Apply gravel mulch in wet climates. Mark plant locations for spring.
Winter (December-February)
Minimal care needed. Check container plants in unheated storage, water lightly if bone dry. Plan next year’s garden. Browse nursery catalogs for new catmint introductions.
Buying Catmint Online vs. Local: Making the Right Choice
When Local Wins
You want to inspect plants personally. You need plants immediately. You value expert local advice. You want to support local businesses. You’re buying heavy or large quantities where shipping costs are prohibitive. You want climate-adapted stock.
When Online Makes Sense
You want rare or new cultivars not carried locally. You live in an area with few nursery options. You’re planning ahead and can wait for shipping. The online retailer offers a strong guarantee. You’re buying bareroot divisions in early spring, which ship well and cost less.
Hybrid Approach
Many gardeners do both. Shop local for common varieties and immediate needs. Order online for specialties. Use online research to identify varieties you want, then ask your local nursery if they can order them. Many independents will special-order for customers.
Budget-Friendly Tips for Building Your Catmint Collection
Start Small, Divide Later
Buy one or two plants of each variety you want. In three years, divide them into dozens. A single ‘Walker’s Low’ can yield six to eight divisions. That’s a massive return on a ten-dollar investment.
Shop End-of-Season Sales
Nurseries discount perennials heavily in late summer and fall to clear inventory. Catmint planted in September establishes well before winter. You may pay half the spring price. The plant might look tired, but the roots are healthy.
Join a Garden Club or Plant Swap
Members often bring divisions of proven performers. You get locally adapted plants for free or a nominal fee. Plus, you gain gardening friends and knowledge.
Grow from Seed for Mass Plantings
If you need fifty plants for a slope, seed is economical. Nepeta racemosa and Nepeta x faassenii come true enough from seed for massing. Start indoors eight weeks before last frost. Transplant seedlings to cell packs, then to the garden. They’ll bloom year two.
Catmint and Wildlife: Beyond the Pollinators
Beneficial Insects
Catmint attracts parasitic wasps, hoverflies, lacewings, and ladybugs. These predators control aphids, caterpillars, and other pests in your vegetable garden. Plant catmint near your veggies as a biological control station.
Birds
Goldfinches eat catmint seeds in fall and winter. Leave seed heads standing. The dense foliage provides shelter for small birds. Hummingbirds visit the flowers, especially in early morning and late afternoon.
Deer and Rabbit Resistance
The strong aromatic oils deter browsing. In severe drought or high population pressure, deer may nibble new growth, but they rarely destroy established plants. This makes catmint invaluable in unfenced rural and suburban gardens.
Cats
Some cats roll on catmint, others ignore it. The response is genetic. If neighborhood cats flatten your plants, insert short stakes or use a low wire cage until plants are woody and less appealing. Most cats prefer catnip anyway.
Conclusion: Your Catmint Journey Starts Now
Finding catmint plants near me is the first step toward a garden that buzzes with life, requires minimal upkeep, and delivers months of color. Whether you choose a compact ‘Kit Cat’ for a pot on your patio, a drift of ‘Walker’s Low’ along your driveway, or a towering ‘Six Hills Giant’ behind your roses, you are investing in a plant that gives back far more than it asks.
Visit your local nursery this week. Talk to the staff. Feel the foliage. Smell the minty aroma. Pick the healthiest plants you can find. Plant them in a sunny, well-drained spot. Water them in. Then step back and watch. Within weeks, the pollinators will find them. Within a year, you’ll be dividing and sharing. Within a few seasons, you’ll wonder how you ever gardened without catmint.
The search for catmint plants near me ends with a shovel in your hand and a garden transformed. Happy planting.
Frequently Asked Questions
What is the difference between catmint and catnip?
Catnip (Nepeta cataria) is a weedy species that strongly attracts cats and self-seeds aggressively. Catmint refers to ornamental Nepeta hybrids and cultivars grown for their showy flowers, tidy habit, and garden performance. Catmint contains far less of the compound that affects cats.
How do I keep my catmint from flopping open in the middle?
Flopping usually results from too much shade, water, or fertilizer. Ensure full sun, lean soil, and minimal watering once established. Perform the Chelsea Chop in late spring by cutting stems back by half when they reach 12-18 inches tall. This produces shorter, sturdier growth. Divide crowded clumps every 3-4 years.
When should I cut back catmint for winter?
Leave the dead foliage standing through winter to protect the crown and provide wildlife habitat. Cut back to the ground in early spring before new growth emerges, typically March or April depending on your zone.
Why is my catmint not blooming well?
Insufficient sun is the most common cause. Catmint needs 6+ hours of direct sunlight. Over-fertilizing, especially with nitrogen, promotes foliage over flowers. Overcrowding and old, woody centers also reduce blooming. Divide and replant vigorous outer sections.
Can catmint grow in shade?
Catmint tolerates light shade (4-6 hours of sun) but will flower less, grow leggier, and be more prone to flopping and powdery mildew. For best performance, plant in full sun.
Is catmint invasive?
No, ornamental catmint varieties are clump-forming and do not spread by runners or aggressive self-seeding like catnip. They stay where planted and slowly expand the clump. Division every few years keeps them in bounds.