Once these plants get established they will handle hot dry conditions better than others. Plants are an investment, and to reap the benefits they must be watered and fed. Drought tolerant simply means is that they can withstand drier conditions better than more water-thirsty varieties.
Artemisia or Worm Wood, Bachelor's Buttons, Bell Flower, Bergenia, Black Eyed Susan, Blanket Flower, Butterfly Weed, Catmint, Coreopsis, Crocosmia, Daylily, Delosperma or Ice Plant, Dianthus or Pinks, Echinacea, Evening Primrose, Foxglove, Gaura, Grasses: Lucerne (Blue Eyed Grass), Festuca (Blue Fescue), Goldenrod, Helicototrichon (Blue Oat Grass), Hens & Chicks, Hibiscus, Honeysuckle, Iris, Kniphofia or Red Hot Poker, Lamb's Ear, Lavender, Lewisia, Lysimachia (Creeping Jenny) or Loosestrife, Penstemon or Bearded Tongue, Russian Sage, Salvia, Sedum (Stonecrop), Silverlace Vine, Sweet Kate (Blue and Gold Spiderwort), Yarrow and Yucca.
Barberry, Butterfly Bush, Elderberry, Kerria Japonica, Quince, Rose of Sharon, Tamarix (Salt Cedar) and Wintercreeper
Ageratum, Begonia, Celosia, Cosmo, Dianthus, Dipladenia, Dusty Miller, Eucalyptus, Gazania, Ivy, Lantana, Licorice Plant, Morning Glory, Nicotiana, Osteospermum or Trailing African Daisy, Phlox, Pink Evening Primrose, Portulaca, Sedum, Salvia, Verbena, Periwinkle and Zinnia.
Dill, Fennel, Lavender, Mint, Oregano, Rosemary, Sage, Thyme and Winter Savory.