Creeping thyme is evergreen in zones 4 through 9 but will darken during winter. Creeping Thyme is the ideal groundcover for the gardener that wants it all - utility, color, and even a lemony fragrance! A diminutive flower that grows usually no more than half a foot tall, Creeping Thyme is the ultimate low-maintenance perennial.,Creeping thyme is evergreen in zones 4 through 9 but will darken during winter. Creeping Thyme is