Answer
What are the best drought-tolerant plants?
Lavender, salvia, sedum, grasses, euphorbia and verbena, on free-draining ground.
In short
For dry, sunny spots, Mediterranean and prairie planting copes well: lavender, salvia, sedum, ornamental grasses, euphorbia and verbena. Matched to free-draining ground they thrive with little watering, which makes for a lower-maintenance, more sustainable garden.
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