Catmint is a low spreading herbaceous perennial that grows 12-15 in. high and spreads 2-4 ft. wide. Its aromatic foliage is comprised of pale green heart-shaped leaves with serrated margins; tall spikes of deep lavender-blue flowers occur in mid to late spring.
This catmint is a hybrid resulting from the crossing of N. racemosa and N. nepetella, and has proven to be one of the most popular cultivars for garden plantings. As the common name suggests, cats are sometimes attracted to its foliage and will sometimes roll in it (it is a relative of catnip). It depends on the cat. Often cats will completely ignore it, but some love it. Catmint is commonly planted along borders and in perennial gardens for its springtime color and neat growth habit. It grows best in sunny locations, well-drained soils and with moderate amounts of water through the flowering cycle. By the end of fall most plants have become open and leggy; winter pruning helps restore size and renew spring growth. Several cultivars are available from nurseries and garden centers.