Phlomis purpurea - white form

Medium, sprawling shrub native to Spain, Portugal, and Morocco, to 5-6' tall and wide with wooly, gray-green leaves and crisp white, whorled flowers that sit just atop the foliage throughout the year, with the heaviest bloom in late spring. Best in full sun with well-drained soil, but can adapt to semi-shade areas, too. Requires very little summer watering once established. Frost hardy to upper USDA zone 7. Deer tolerant. Cut back spent flower stems after blooming to encourage more flowers. 

WHITE JERUSALEM SAGE

Lamiaceae