Answer: Can you visit local gardens, to see what thrives there, and what suits your fancy? Native plants are always a good choice, because they've proven themselves to be well adapted to the climate. Unfortunately, I'm not familiar with the plants of your region. If it is very dry there, you might consult a reference book such as "Xeriscape Gardening: Water Conservation for the American Landscape", by Connie Ellefson (Macmillan, 1992). This book gives lots of tips about conserving water and choosing plants. However, I would be cautious about introducing non-native plants to your region. Is there a Department of Agriculture you could consult, to see about regulations for importing plants?
Some possibilities for that spot include ornamental grasses, various types of artemisia, sage (salvia), penstemon, or flax species. Again, I'm not sure of your particular climate (esp. rainfall and seasonality of rain) and availability of plant material, so I'd check with local gardeners and nurseries.
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