Answer: The best way to ensure that plants can handle heat is to make sure the soil is well prepared with ample organic matter -- this will help it hold moisture longer. You should also be sure to mulch your plants with several inches of organic mulch to help keep the soil cool and retain moisture. Finally, the most effective way to water is to water deeply but less often rather than a daily sprinkling. Having said that, some perennial plants to consider are: crocus, creeping thyme, dianthus, gaillardia, achillea, coreopsis, purple coneflower, daylily, sedum and iris.
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