Yes, catmint come back every year without any replanting needed. It's a true herbaceous perennial that returns each spring from the same root system. The top growth dies off in winter, but the roots stay alive underground. Fresh green shoots push up as soon as your soil warms in spring.
I first planted Walker's Low catmint in my Zone 6 garden about eight years ago. It has returned every single spring since then. The first winter, I watched all the foliage turn brown and dry up. I was sure the plant had died. Then in mid-March, tiny green leaves pushed up from the base of the old crown. That catmint perennial nature is one reason so many gardeners love this plant. You invest once and enjoy it for many years.
Your catmint stores energy in its roots during the growing season. Think of the crown as a battery that charges up all summer. The crown sits right at soil level where roots meet stems. When frost kills the top growth, that crown keeps all its stored fuel safe under the soil. Once your ground warms above 45°F (7°C) in spring, the crown uses that fuel to push out a full flush of new growth.
Whether your catmint returns depends on your catmint hardiness zones match. NC State Extension says the Nepeta genus is hardy in USDA Zones 3a through 8b. Popular hybrids like Walker's Low and Cat's Meow handle Zones 5a through 9b based on the specific type. If you live in Zones 3 or 4, stick with species types that have proven cold toughness. In Zone 9, make sure your plants get enough winter chill to trigger their rest period.
You can help your catmint survive winter with a few easy steps. The most important one is to leave old stems standing through the cold months. Don't cut them back in fall. Those dried stems catch snow and trap leaves around the crown. This creates a natural blanket that shields the roots from the worst cold snaps. Cutting in fall strips that cover away and puts your plant at risk.
In Zones 3 and 4, add 2 to 3 inches (5 to 8 centimeters) of mulch over the crown once your ground freezes. Straw, shredded leaves, or pine needles all work great for this job. Pull the mulch back in early spring before new growth starts. This keeps the crown from sitting in too much moisture as the snow melts. In Zones 5 through 8, your catmint rarely needs any extra winter help at all.
When I told a neighbor about my eight-year-old catmint, she thought I was joking. She'd been buying new plants every spring because she assumed hers died each winter. Turns out she was cutting her plants back in October and raking away all the leaf litter. Both mistakes left her crowns exposed to freeze damage. Once she stopped fall pruning, her catmint came back strong the next year.
Don't feed your catmint in late summer or fall. Extra food pushes soft new growth that can't survive a frost. Let the plant wind down on its own as days get shorter. With these basic habits, you can expect reliable returns for 5 to 10 years or even longer from a single planting. Divide your clumps when the center thins out and you'll keep the cycle going for decades.
Read the full article: Catmint Plant Care and Growing Guide
