Step-by-Step Growing Guide
Catnip (Nepeta cataria) is a vigorous, cold-hardy mint-family perennial that grows in any well-drained soil with a pH of 6.1–7.8 — it positively thrives in poor, rocky soils where other herbs struggle. Start seeds indoors 6–8 weeks before last frost, pressing seeds onto the surface of moist seed-starting mix (they need light to germinate). Transplant after frost danger passes, spacing 18–24 inches apart. Alternatively, direct sow in fall for spring germination. Water regularly during establishment, then reduce — established catnip is quite drought-tolerant. Fertilize sparingly; over-fertilization reduces nepetalactone concentration (the compound that drives cats wild and serves as a mild sedative for humans). The challenge with catnip in gardens is protecting it from neighborhood cats, who will roll in and destroy young plants before they harden — protect with wire cloches or mesh covers until plants are firmly established. Cut plants back by half after flowering to promote a second flush of clean foliage.
