Catnip Seeds 3020 Heirloom Herb. While this plant won’t win a beauty pageant, the greyish-green, heart-shaped leaves make a soothing tea. And of course cats go wild for it! In the garden plants can grow to 90 cm (3′) high. Catnip will self-sow and establish persistent stands. In most situations, catnip is a short lived perennial hardy in Zones 3-9.
How to Grow
1650 seed/gram. Sow seed directly outside in a sunny spot in May. Barely cover seed and keep the soil moist through the 7-14 day germination period. Thin plants in the garden to 25 cm (10″) apart.