Catmint (Nepeta): Planting & Care Guide

If you want a perennial that blooms for months, shrugs off drought, gets ignored by deer, and pulls in bees and butterflies without asking much in return, catmint (Nepeta) is hard to beat. This soft, silvery-leaved plant froths with lavender-blue flowers from late spring into fall and asks for little more than sun and decent drainage. Whether you garden in a cold-winter US zone or a warm Singapore courtyard, this guide covers everything from planting to the famous mid-season chop-back that keeps the show going.

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Light, soil, and where to plant catmint

Catmint is a sun lover. Give it at least six hours of direct light a day and it will reward you with dense, compact mounds and heavy flowering. In too much shade the stems stretch, flop open in the middle, and bloom only sparingly. In hot climates a touch of afternoon shade is fine, but in temperate gardens full sun is the goal.

Soil that drains

If catmint has one non-negotiable demand, it is drainage. These are Mediterranean-adapted plants that resent wet feet, especially over winter. Soggy soil is the most common cause of a catmint that rots and disappears. The good news is that it is otherwise unfussy and actually performs best in lean, average soil.

• Best soil: sandy or loamy, neutral to slightly alkaline, never waterlogged.
• Avoid: heavy clay and low spots that puddle after rain.
• Fertility: rich, heavily amended beds produce floppy, leggy growth and fewer flowers, so go easy.
• Containers and raised beds: excellent options if your native soil holds water, which is especially useful in tropical Singapore where downpours are frequent.

For more on matching plants to your conditions, see our broader plant & flower care guide.

How to plant catmint

Catmint is one of the most forgiving perennials to establish. The best planting windows are spring after the last frost or early fall, giving roots time to settle before extreme heat or cold. In a frost-free climate, plant in the cooler, drier stretches of the year and avoid setting plants out right before a heavy monsoon period.

1. Dig a hole roughly twice as wide as the root ball and just as deep.
2. Loosen the roots gently if they are circling the pot.
3. Set the plant so the crown sits level with the soil surface, never buried.
4. Backfill, firm lightly, and water in to settle the soil.
5. Space plants 18 to 24 inches apart, or up to 3 feet for large varieties like Six Hills Giant.

A thin gravel or grit mulch around the crown helps keep moisture off the stems and reflects the well-drained, sunny look catmint loves. You can buy starts as catmint plants online or pick them up at a local nursery.

Watering and feeding

Water newly planted catmint regularly for the first few weeks while it roots in. After that, it becomes genuinely drought tolerant and you can largely leave it alone. Overwatering is far more dangerous than underwatering, so let the soil dry between drinks and only water established plants during prolonged dry spells.

Keep feeding light

Catmint thrives on neglect when it comes to fertilizer. Heavy feeding pushes lush, weak growth that flops and blooms poorly. At most, work a little compost into the soil at planting and give one light dose of a balanced fertilizer in early spring. In containers, where nutrients leach out faster, a light spring feed is more worthwhile, but still resist the urge to overdo it.

The chop-back for rebloom

This is the single most important catmint technique, and it is wonderfully simple. After the first big flush of bloom fades, usually in early to midsummer, the plant starts to look tired, flowers brown out, and stems flop open. Instead of deadheading flower by flower, you cut the entire plant back hard.

• When: as the first flush finishes and the plant looks spent.
• How much: shear it back by one third to one half, removing the bloomed-out tops.
• The result: within a couple of weeks it pushes fresh, tidy foliage and a strong second wave of flowers that can last into fall.

A clean, sharp tool makes this painless. A good pair of bypass pruners or hedge shears lets you shear the whole mound in seconds. In late fall or early spring, do a final cleanup cut to a few inches above the ground to remove the old stems before new growth begins. Leaving some structure over winter in cold zones can help protect the crown.

Dividing and propagating

Most catmint varieties are long-lived and rarely need dividing for their health, but you can divide every three to four years to keep clumps vigorous, control their spread, or make free plants. Divide in early spring as new growth appears, or in early fall.

1. Dig up the whole clump and lift it out of the ground.
2. Use a spade or sharp knife to split it into sections, each with roots and shoots.
3. Replant the divisions promptly at the same depth and water in.

You can also take softwood cuttings in late spring. Note that many of the best garden forms are sterile hybrids that produce little or no viable seed, which is part of why they bloom so long and do not self-sow into a weedy mess. Division and cuttings are the reliable way to multiply those named varieties true to type.

Popular catmint varieties

There is a catmint for almost every spot, from edging at the front of a bed to a substantial billowing backdrop. A few standouts are worth knowing by name.

• Walker’s Low: despite the name it grows around 24 to 30 inches tall and wide, a reliable, award-winning workhorse with soft lavender-blue spikes. Perennial Plant of the Year in 2007 and still a benchmark.
• Cat’s Pajamas: a compact, tidy newer selection about 14 to 18 inches tall, with flowers that run right down the stems and a neat dome shape that needs little staking. Great for smaller gardens and the front of borders.
• Six Hills Giant: the big one, reaching 3 feet or more in height and spread, ideal for filling large spaces and making a bold, hazy edge along a path.
• Little Titch and Cat’s Meow: additional compact options if you want the look in a smaller footprint.

Is catmint the same as catnip?

This is the most common question about Nepeta, and the answer is no, though they are close cousins. Both belong to the genus Nepeta, but the ornamental catmints grown in gardens are usually Nepeta hybrids and species like Nepeta faassenii and Nepeta racemosa, prized for their tidy form and long bloom. True catnip is Nepeta cataria, a coarser, weedier plant with white flowers and much higher levels of the compound nepetalactone that sends cats into a frenzy.

Garden catmints do contain some nepetalactone, so a curious cat may roll on a plant now and then, but they are far less of a magnet than true catnip. If your goal is ornamental flowers and pollinators, choose catmint; if you want to delight a feline, grow catnip.

Pollinators, deer resistance, and border design

A pollinator magnet

Catmint is one of the best perennials you can plant for pollinators. Its long bloom season provides a steady nectar supply for honeybees, native bees, butterflies, and even hummingbirds. Because it flowers for months and reblooms after a chop-back, it bridges the gaps when other plants are between flushes.

Deer and rabbit resistant

The aromatic, slightly minty foliage that pollinators love is exactly what browsing animals dislike. Deer and rabbits almost always pass catmint by, making it a smart choice for gardens on the edge of woods or fields where browsing pressure is high. No plant is truly deer-proof, but catmint ranks among the most reliably ignored.

Using it in borders

Catmint’s soft, hazy texture and cool blue-purple tones make it a brilliant team player. It is a classic underplanting for roses, softening their bare lower stems, and pairs beautifully with yellow and orange flowers, salvias, and ornamental grasses. Use it to edge a path where it can spill gently over the hard line, or mass it for a river of blue.

For more low-effort, high-impact pairings, browse our low-maintenance landscaping ideas, and consider combining catmint with a spring-flowering groundcover like creeping phlox for a long, layered season of color.

Frequently asked questions