This week's show introduces elements of a landscape plan that promises to be more efficient and effective in an environment that seems to be moving toward the hotter and drier side of gardening. Ornamental grasses can offer a rich variety of size, texture and color to a planted area or in a series of containers. And they can provide visual interest almost year round, as many grass gardens can show off fall colors and wintertime backdrops when other plants have been put to rest.