Got a green thumb? This perfect “grow your own” DIY catnip plant kit includes directions, catnip seeds, one peat pellet disk and a small sample of catnip. The plant grows to maturity between 45 to 90 days and reaches a height of 3 feet tall maximum. There are enough seeds in our pack to grow dozens of catnip plants, but not all seeds will grow, some will decide to remain dormant until the next season, so always put 5 or 6 seeds in your pellet disk to be sure!