Perennial: Drought tolerant. Good in containers, in hanging baskets, on banks, walls and along driveways. Great ground cover. Nearly ever blooming. Attracts butterflies. Bloom color: purple. Height: 1-2 feet. Width: 2-3 feet. Exposure: sun. Water: moderate/dry. USDA Z4. (GLANDULARIA canadensis 'Homestead Purple')