Check out my CA deer grass (Muhlenbergia rigens). I planted it when it was root bound after living in a pot for 5 years while I got my act together about landscaping. Before being planted, it had never gotten more than a foot tall and produced a few sad blades.
Now, approaching its 3rd winter in the ground, it is 6 feet tall and wide! I also got a bonus surprise: it produces little lavender flowers :) I get such pleasure seeing its magnificent blades sway in the wind, heavy with flower and seed. And yes, intensely drought tolerant as it performs with an astonishingly low -- even to me, the Water Scrooge -- amount of water. ... See MoreSee Less