Catnip (Nepeta cataria) - Key Growing Information
DAYS TO GERMINATION: 7-10 days at 60-70°F (16-21°C).
SOWING: Transplant (recommended): Start 6-8 weeks before the last frost in the spring. Barely cover with vermiculite; seeds require light to germinate. Thin to one plant per cell, pinching out the growing tip for a bushier plant. Transplant outside when 3" tall with a final spacing of 12-18".
Direct seed: Direct seed after the last spring frost or in early fall, sowing 2-3 seeds per inch. Tamp seeds onto the surface of the soil or just barely cover them; seeds require light to germinate. Commercial growers should start with well-irrigated soil beds and roll the seeds into the soil. Rows should be 18" apart and individual plants thinned to 12-18" apart.
LIGHT PREFERENCE: Sun.
SOIL REQUIREMENTS: Catnip will grow almost anywhere, but ideally in sandy soil.
PLANT HEIGHT: 24-48".
PLANT SPACING: 12-18".
HARDINESS ZONES: Zones 3-9.
HARVEST: Harvest individual leaves when the plants have become established. The top 3/4 of the plant maybe harvested starting in the second year. To dry, hang branches upside down in a well-ventilated, dry location out of sunlight.
Note: Once established, catnip is very hardy and self-sows readily.
SCIENTIFIC NAME: Nepeta cataria