Blue Wonder Catmint Plants

Blue Wonder catmint (Nepeta × faassenii ‘Blue Wonder’) is a compact, drought-tolerant perennial that produces masses of lavender-blue flowers from late spring through fall. This low-maintenance plant attracts pollinators, resists deer and rabbits, and thrives in poor soil with minimal care.

If you have ever walked past a garden in early summer and noticed clouds of soft purple-blue flowers buzzing with bees, chances are you were looking at catmint. Among the many varieties available, Blue Wonder catmint plants stand out as a garden favorite. This compact perennial delivers big impact in a small package. It fits into tight spaces, asks for very little, and gives back months of color.

I first planted Blue Wonder catmint along a sunny sidewalk strip where the soil was terrible and the hose never reached. Three years later, those same plants still greet me with waves of blooms every June. They have survived drought, neglect, and a curious neighborhood cat who found them irresistible. If you want a plant that performs like a pro but asks for amateur-level effort, keep reading. This guide covers everything you need to know about growing, caring for, and designing with Blue Wonder catmint.

Key Takeaways

• Compact growth habit: Blue Wonder catmint forms neat mounds 12-18 inches tall and wide, perfect for borders and containers.
• Long bloom season: Enjoy lavender-blue flowers from late spring through early fall with proper deadheading.
• Drought tolerant: Once established, these plants need minimal watering and thrive in dry conditions.
• Pollinator magnet: Bees, butterflies, and hummingbirds flock to the nectar-rich blooms all season long.
• Deer and rabbit resistant: The aromatic foliage naturally deters browsing animals from your garden.
• Low maintenance: Requires little fertilizer, minimal pruning, and adapts to various soil types.
• Versatile design uses: Works beautifully in cottage gardens, rock gardens, edging, and mixed perennial beds.

Quick Answers to Common Questions

How tall does Blue Wonder catmint grow?

Blue Wonder catmint grows 12-18 inches tall and wide, forming a compact mound perfect for front-of-border planting.

When does Blue Wonder catmint bloom?

It blooms from late spring through early fall, with the heaviest flush in June and repeat blooms after shearing.

Is Blue Wonder catmint drought tolerant?

Yes, once established it is highly drought tolerant and thrives in dry, lean soil conditions.

Does Blue Wonder catmint spread aggressively?

No, it is a sterile hybrid that clumps slowly and does not self-seed or run invasively.

How do I get my catmint to rebloom?

Shear the plant back by half after the first flush fades in early summer to encourage a second heavy bloom cycle.

What Is Blue Wonder Catmint?

Botanical Background

Blue Wonder catmint carries the botanical name Nepeta × faassenii ‘Blue Wonder’. It belongs to the mint family, Lamiaceae, which explains its aromatic foliage and spreading habit. This hybrid originated from a cross between Nepeta racemosa and Nepeta nepetella. The result is a sterile cultivar that does not self-seed aggressively like some of its wild cousins.

The plant forms a tidy mound of gray-green leaves. The foliage releases a pleasant, minty scent when brushed or crushed. From late spring through early fall, spikes of lavender-blue flowers rise above the leaves. Each tiny bloom is tubular and two-lipped, perfectly shaped for pollinators. The overall effect is a soft, hazy cloud of color that moves beautifully in the breeze.

How It Differs from Other Catmints

You might wonder how Blue Wonder catmint compares to the popular ‘Walker’s Low’ or the species Nepeta racemosa. The main difference is size. ‘Walker’s Low’ grows 24-30 inches tall and wide. Blue Wonder catmint plants stay compact at 12-18 inches. This makes them ideal for the front of borders, edging paths, or growing in containers.

Another distinction is bloom time. Blue Wonder catmint starts flowering earlier than many varieties. It also reblooms more reliably after shearing. The flower color is a true lavender-blue, not the pale lavender of some types. And because it is sterile, you will not find unwanted seedlings popping up everywhere.

Hardiness and Growing Zones

Blue Wonder catmint plants thrive in USDA zones 3 through 8. They handle cold winters with ease. In zone 3, they benefit from a light mulch after the ground freezes. In the warmer end of their range, zone 8, they appreciate some afternoon shade. They struggle in the deep South where humidity and heat combine. If you garden in zone 9 or 10, look for heat-tolerant alternatives like Nepeta subsessilis.

Choosing the Perfect Planting Site

Sun Requirements

Full sun is non-negotiable for the best flower show. Blue Wonder catmint plants need at least six hours of direct sunlight daily. Eight hours is even better. In partial shade, the plants become leggy. They flop open in the center. Flower production drops dramatically. The foliage loses its compact, mounded shape.

If your garden offers only morning sun, you can still grow catmint. Just expect fewer blooms and a looser habit. Afternoon shade in hot climates actually helps prevent stress. But deep shade? Skip it. The plant will survive but never thrive.

Soil Preferences

Here is the good news. Blue Wonder catmint plants are not picky about soil. They grow in clay, sand, loam, or rocky ground. The one requirement is drainage. Wet feet kill catmint faster than anything else. If your soil stays soggy after rain, amend it with compost and coarse sand. Or plant in raised beds.

Soil pH between 6.0 and 7.5 works fine. Slightly alkaline soil is ideal. These plants actually prefer lean soil. Rich, fertile soil encourages floppy growth and fewer flowers. Hold the fertilizer. Your catmint does not need it.

Spacing and Air Circulation

Space plants 18-24 inches apart. This allows air to circulate freely. Good airflow prevents fungal issues like powdery mildew. It also lets each plant develop its natural rounded shape. Crowded plants compete for light and become tall and spindly.

When planting in groups, stagger them in a triangle pattern. This creates a fuller look faster. For edging a path, space them 15 inches apart for a continuous line of color.

Planting Blue Wonder Catmint Successfully

When to Plant

Spring and fall are the best planting times. Spring planting gives roots time to establish before summer heat. Fall planting works well in zones 5-8. The soil is warm, encouraging root growth. Cool air temperatures reduce stress. Avoid planting during summer heat waves or when the ground is frozen.

If you buy plants in summer, keep them in pots in a sheltered spot. Water daily. Plant them out when temperatures cool in early fall.

Step-by-Step Planting Guide

Start by watering the potted plant thoroughly. Dig a hole twice as wide as the root ball. The depth should match the pot level. Loosen the soil at the bottom and sides of the hole. This helps roots penetrate the surrounding earth.

Gently remove the plant from its pot. If roots circle the bottom, tease them apart with your fingers. Place the plant in the hole. The crown should sit at soil level. Backfill with native soil. Do not add fertilizer or rich compost to the planting hole. Firm the soil gently with your hands.

Water deeply to settle the soil. Apply a thin layer of mulch around the base. Keep mulch away from the crown. Shredded bark, pine straw, or gravel all work well. Gravel is especially good in wet climates. It keeps the crown dry.

Container Planting Tips

Blue Wonder catmint plants shine in containers. Choose a pot at least 12 inches wide with drainage holes. Use a gritty potting mix. Mix one part perlite or coarse sand with two parts quality potting soil. This ensures sharp drainage.

Container plants need more frequent watering. Check daily in summer. Fertilize once in spring with a slow-release balanced fertilizer. That is all they need. In winter, move pots to an unheated garage in zones 3-4. In warmer zones, they can stay outside.

Ongoing Care and Maintenance

Watering Wisdom

New plants need regular water for the first growing season. Water deeply once or twice a week. This encourages deep roots. After establishment, Blue Wonder catmint plants are remarkably drought tolerant. In most climates, rainfall is enough.

During extended dry spells, give a deep soak every two weeks. Avoid frequent shallow watering. It promotes surface roots that dry out fast. Water at the base of the plant. Wet foliage invites disease.

Fertilizing: Less Is More

I cannot stress this enough. Do not fertilize established catmint. Rich soil makes weak plants. The stems stretch. The centers open up. Flower production drops. If your soil is extremely poor, a light sprinkle of compost in spring is plenty.

Container plants are the exception. They need one application of slow-release fertilizer in early spring. Use a balanced formula like 10-10-10. Do not fertilize after July. Late growth will not harden off before winter.

Deadheading for Continuous Blooms

This is the secret to months of flowers. When the first flush fades in early summer, shear the entire plant back by half. Use hedge shears or sharp pruners. Cut into a rounded mound shape. New growth emerges within days. A second heavy bloom follows in a few weeks.

Repeat this process after the second flush. In long-season climates, you can get three bloom cycles. The final shear in early fall tidies the plant for winter. Do not shear after September in cold zones. New growth needs time to harden.

Dividing Every Few Years

After three to four years, the center of the plant may die out. This signals division time. Early spring is best. Dig up the entire clump. Use a sharp spade or knife to cut it into sections. Each division needs healthy roots and several shoots.

Replant divisions immediately. Water well. They establish quickly. Division rejuvenates the plant. It also gives you free plants for elsewhere in the garden.

Designing with Blue Wonder Catmint

Front-of-Border Star

The compact height makes Blue Wonder catmint plants perfect for the front of sunny borders. Plant them in drifts of three, five, or seven. The soft mounds create a living edge. They hide the bare legs of taller perennials behind them.

Pair them with coneflowers, black-eyed Susans, or Russian sage. The lavender-blue flowers complement yellow, orange, pink, and white beautifully. The gray-green foliage provides a cooling contrast to hot-colored blooms.

Pathway Edging

Line a garden path with Blue Wonder catmint. The aromatic foliage releases scent when brushed. The flowers spill softly over the edges. It creates a romantic, cottage-garden feel. Space plants 15 inches apart for a continuous hedge.

They tolerate occasional foot traffic. If they get stepped on, they bounce back. Just avoid planting where heavy traffic occurs daily.

Rock Garden and Slope Planting

The drought tolerance and love of lean soil make catmint a rock garden natural. Tuck plants between boulders. Let them cascade over stone walls. On slopes, their fibrous roots help hold soil. The mounded habit looks intentional among rocks.

Combine with sedums, creeping thyme, and dwarf conifers. The texture contrast is stunning.

Container Combinations

In pots, Blue Wonder catmint plays well with others. Try it as the “filler” in a thriller-filler-spiller design. Pair with a tall grass like purple fountain grass as the thriller. Add trailing verbena or calibrachoa as the spiller.

Or create a monochromatic blue pot. Combine with blue salvia, blue lobelia, and blue fescue grass. The varying shades and textures create depth.

Pollinator and Wildlife Gardens

If you want bees, butterflies, and hummingbirds, plant catmint. The nectar-rich flowers feed them for months. Plant in groups of five or more for maximum impact. Pollinators prefer mass plantings.

Leave some seed heads in fall. Goldfinches eat the tiny seeds. The dried stems provide winter shelter for beneficial insects.

Common Problems and Solutions

Floppy, Open Centers

This is the number one complaint. The plant looks great in spring. By midsummer, it splays open. The center turns woody and bare. The cause is usually too much shade, too much water, too much fertilizer, or lack of shearing.

The fix: Move to full sun if possible. Stop fertilizing. Water less. Shear back hard after first bloom. Divide in spring if the plant is old.

Powdery Mildew

In humid climates or crowded plantings, powdery mildew appears. It looks like white dust on leaves. It rarely kills the plant but looks unsightly.

Prevention: Space plants for airflow. Water at soil level. Choose resistant varieties (Blue Wonder has good resistance). Treatment: Remove affected leaves. Spray with neem oil or potassium bicarbonate. Improve air circulation.

Root Rot

Yellowing leaves, wilting despite wet soil, and a foul smell indicate root rot. This happens in poorly drained soil.

Prevention is the only cure. Plant in well-drained soil. Use gravel mulch in wet areas. If caught early, dig the plant, trim rotten roots, and replant in a better spot.

Cat Damage

Yes, cats love catmint. They roll on it, chew it, and flatten it. Blue Wonder catmint plants contain nepetalactone, the compound that attracts cats.

If neighborhood cats destroy your plants, try these deterrents: Place chicken wire over the plant until established. Use prickly mulch like pine cones. Spray with commercial cat repellent. Plant a sacrificial patch of catnip (Nepeta cataria) elsewhere. Most cats prefer true catnip over ornamental catmint.

Seasonal Care Calendar

Spring (March-May)

Cut back dead stems to the ground in early spring. Apply a thin layer of compost if desired. Divide crowded clumps. Plant new purchases. Water new plants regularly. Watch for first flower buds in late spring.

Summer (June-August)

Enjoy the first big bloom in June. Shear back by half after flowers fade. Water during drought. Deadhead spent blooms if you do not shear. Watch for second flush in July-August. Shear again if desired.

Fall (September-November)

Final light shear in early September (zones 3-5) or October (zones 6-8). Stop fertilizing. Reduce watering. Apply winter mulch in cold zones after ground freezes. Leave some stems for winter interest and wildlife.

Winter (December-February)

Plants are dormant. No care needed. In containers, protect from freeze-thaw cycles. Check occasionally for heaving. Push plants back into soil if they pop up.

Propagation Methods

Division

As mentioned, division is the easiest method. Do it in early spring. Each piece needs roots and shoots. Replant immediately. Water well. Divisions bloom the same year.

Stem Cuttings

Take 4-inch cuttings in late spring or early summer. Choose non-flowering stems. Remove lower leaves. Dip in rooting hormone. Stick in moist perlite or sand. Cover with a plastic bag. Place in bright, indirect light. Roots form in 2-3 weeks.

Layering

In spring, bend a low stem to the ground. Wound it slightly where it touches soil. Pin it down with a landscape staple. Cover with soil. Water. Roots form at the wound by fall. Cut from mother plant and transplant.

Companion Planting Ideas

Best Perennial Partners

• Salvia nemorosa: Similar needs, complementary spikes of blue-purple.
• Echinacea purpurea: Coneflowers add height and bold color.
• Perovskia atriplicifolia: Russian sage shares the airy, lavender-blue look.
• Achillea millefolium: Yarrow’s flat heads contrast with catmint’s spikes.
• Coreopsis verticillata: Threadleaf coreopsis adds fine texture and yellow blooms.
• Sedum ‘Autumn Joy’: Late-season interest when catmint slows down.
• Ornamental grasses: Blue fescue, fountain grass, or little bluestem.

Rose Underplanting

Blue Wonder catmint plants make classic rose companions. They hide bare rose canes. Their scent may deter aphids. The lavender-blue flowers complement every rose color. Plant them 18 inches from the rose base. Shear catmint after its first bloom to avoid competing with rose’s June show.

Herb Garden Integration

Since catmint is in the mint family, it fits naturally in herb gardens. Plant near lavender, thyme, oregano, and sage. They share the same Mediterranean preferences. The combined aromas are heavenly on a warm evening.

Buying Guide: Selecting Healthy Plants

What to Look For

At the nursery, choose plants with these traits: Compact, bushy shape. No leggy stems. Healthy gray-green leaves. No yellowing or brown spots. White, firm roots visible at drainage holes. Flower buds forming but not fully open. No weeds in the pot.

Avoid plants that are root-bound, flowering heavily in the pot, or have mossy soil surface. These indicate old stock or poor care.

Where to Buy

Local independent nurseries often carry the best selections. They grow plants suited to your climate. Staff can offer specific advice. Mail-order specialists like Bluestone Perennials, White Flower Farm, or High Country Gardens ship healthy, well-rooted plants. Big box stores are hit or miss. Plants may be stressed from shipping and poor care.

Size Options

Quart pots (4-inch) are economical. They establish fast. Gallon pots give instant impact. Plug trays (32-72 cells) are cheapest for mass planting. But they need a season to bulk up. For immediate results, buy gallons. For large areas, buy plugs and grow them on in a holding bed for a few months.

Blue Wonder Catmint vs. Other Popular Varieties

Blue Wonder vs. Walker’s Low

Walker’s Low is the classic tall catmint. It grows 24-30 inches. Blue Wonder stays 12-18 inches. Walker’s Low won Perennial Plant of the Year in 2007. Blue Wonder offers the same flower power in half the space. Choose Walker’s Low for middle of border. Choose Blue Wonder for front of border or containers.

Blue Wonder vs. Junior Walker

Junior Walker is a newer dwarf selection. It grows 15-18 inches. Very similar to Blue Wonder. Junior Walker may have slightly darker flowers. Both are excellent. Availability often determines which you find.

Blue Wonder vs. Cat’s Pajamas

Cat’s Pajamas is a Proven Winners introduction. It grows 12-14 inches. Very compact. Flowers are indigo-blue. Blooms earlier than Blue Wonder. More upright habit. Slightly less drought tolerant. Both are sterile hybrids.

Blue Wonder vs. Species Nepeta racemosa

The species grows 12-24 inches. It self-seeds prolifically. Flower color varies from pale lavender to blue. Blue Wonder is uniform, sterile, and more compact. The species is better for naturalizing. Blue Wonder is better for designed gardens.

Frequently Asked Questions About Blue Wonder Catmint

Is Blue Wonder catmint invasive?

No. Blue Wonder catmint plants are sterile hybrids. They do not produce viable seeds. They spread slowly by clumping, not running. They stay where you plant them. Division every few years keeps them in bounds.

Does catmint attract cats like catnip?

Yes, but less intensely. Catnip (Nepeta cataria) contains higher nepetalactone levels. Most cats prefer catnip. Some cats ignore ornamental catmint entirely. If cats are a problem, see the deterrent tips in the problems section.

Can I grow Blue Wonder catmint indoors?

Not successfully long-term. It needs full sun, winter dormancy, and air circulation. You can overwinter a pot in a cool, bright garage. But it will not thrive as a houseplant.

Why is my catmint not blooming?

Usually insufficient sun. Less than six hours reduces flowers dramatically. Other causes: too much nitrogen fertilizer, overcrowding, or the plant needs division. Shearing after first bloom encourages rebloom.

When should I cut back catmint for winter?

Leave stems standing through winter. They protect the crown. They provide insect habitat. They look pretty with frost. Cut back to the ground in early spring before new growth emerges.

Can I eat Blue Wonder catmint?

The leaves are edible but not tasty. They make a mild tea. True catnip or culinary mint varieties are better for kitchen use. Blue Wonder is grown for ornament, not flavor.

Conclusion

Blue Wonder catmint plants earn their place in any sunny garden. They ask for so little: sun, drainage, and an occasional haircut. In return, they give months of pollinator-friendly blooms, aromatic foliage, and a tidy form that fits almost anywhere. Whether you edge a path, fill a container, or drift them through a border, they perform reliably.

I have grown many perennials over the years. Few deliver such consistent satisfaction with so little fuss. If you have a sunny spot and well-drained soil, make room for Blue Wonder catmint. Plant three. Watch them bloom. Shear them back. Watch them bloom again. Share divisions with friends. This is gardening at its most rewarding.

Your garden deserves this little wonder. Go find a spot for it this season.

Frequently Asked Questions

What is the difference between catmint and catnip?

Catmint (Nepeta × faassenii) is an ornamental perennial grown for flowers and foliage. Catnip (Nepeta cataria) is an herb grown for its effect on cats. Catmint is sterile and clump-forming; catnip self-seeds aggressively.

Can Blue Wonder catmint grow in shade?

It tolerates light shade but flowers poorly and becomes leggy. Full sun (6+ hours) is required for best bloom and compact habit.

How often should I water established Blue Wonder catmint?

Established plants rarely need supplemental water except during prolonged drought. Water deeply every 2-3 weeks in extreme heat.

Should I fertilize Blue Wonder catmint?

No. Fertilizer causes floppy growth and fewer flowers. Lean soil produces the strongest, most floriferous plants.

Can I divide Blue Wonder catmint in fall?

Spring division is preferred. Fall division works in zones 6-8 if done 6 weeks before ground freeze. In colder zones, wait for spring.

Why is my catmint turning brown in the center?

This indicates age (3-4 years) or poor conditions. Divide the plant in spring, discarding the woody center and replanting vigorous outer sections.