Plant Cat's Pajamas Catmint in well-drained soil with full sun exposure. Space plants 18-24 inches apart. Water regularly during the first growing season to establish a deep root system, then reduce frequency. Fertilize in early spring with a balanced, slow-release fertilizer. Prune back by one-third after the first bloom to encourage a second flowering. Divide clumps every 3-4 years in early spring to maintain vigor.