Unlike most nepetas that have a bit of a wild, unkempt look, this selection keeps its tidy, densely rounded shape all season long and is topped with sky blue flowers from early summer into fall. This hardy perennial is low maintenance, drought tolerant, deer resistant and long blooming. And of course, cats love it, too. 'Cats Meow' grows to a height of 17 to 20 inches and a spread of 24 to 36 inches. USDA Zones 3 to 8.