Like this look for one of the border gardens - Golden Japanese Forest grass Hakonechloa macra 'Aureola' Perfect dripping over the edge of the rocks along the creek (wet and shady but the sun and a dry spell wont hurt a bit.
[Wonderful combination of plants. I think I'm looking at foxglove, tall bearded iris, and purple violas. Looks like maybe lamb's ear in the bottom left corner--excellent color foil.] What a great looking garden