Note: While catmint can be grown from seed, it's best to purchase nursery-grown plants for reliable results, especially with sterile hybrids that may not grow true from seed. Nepeta ‘Cat’s Pajamas’, Catmint Live Plant, Proven Winners, Fragrant Plant, Perennial Plants in pots and Ready to Plant, not Seeds, ContainerSize: 4.5". How to PlantCatmint. Select a location with good drainage. Catmint enjoys drier sites and will suffer in soggy soil. Catmint thrives in USDA Zones 4-8 and blooms from early summer, continuing throughout the season. Its quick growth and resistance to deer make it ideal for planting from spring to early fall. Catmint flower seeds produce a great general ground cover, accent plant, pathway edger, or rock garden specimen. Catmint Appearance and Characteristics. The catmintplant is highly ornamental, with its soft, gray-green leaves that are aromatic when crushed. Are catnip and catmint different plants, or the same species? Learn how to differentiate between these commonly confused herbs now on Gardener's Path. As garden plants, catmints make a good ground cover and are also popular additions to rock gardens. Catmint is also useful in landscaping as an edging plant. How to plant: Catmint flowers best in full sun to partial shade, preferring some afternoon shade in warmer climates. Follow these steps and space plants 1 to 3 feet apart... What Is Catmint? There are a few different types of catmint, but in general, the perennial plant has a tidier appearance than catnip, growing in slightly sprawling, compact mounds.