Use the feathery features of ornamental grasses to separate swaths, soften hard edges and blend borders. Grasses pose no problems if planted properly. Perennial grasses are easiest to grow because their root systems become very drought tolerant. Most crave sun, heat and well-drained soil. Be sure to plant them with good spacing around them so air and light help them develop to their fullest potential.
Most grasses dislike lots of fertilizer.
Late winter, prune them to just above ground level.