Texas sage bush, or Leucophyllum frutescens, is a drought-resistant shrub that grows well in USDA Hardiness Zones 8 to 11. The plant is also known as the Texas silverleaf, cenzino, purple sage or Texas barometer bush.
Texas sage bush has silver-gray leaves that are accented by pink, purple and blue tubular flowers in summer and fall, according to SFGate. It requires both full-sun placement and well-drained soil to thrive. Too much water will decrease blooms and increase the chance of root rot. No fertilization is required, but the Texas sage bush should be pruned in early spring to encourage new growth.