1 Cool season grasses are planted in the summer or early fall. Their vigorous growing season is mid to late fall. These grasses grow best in northern areas with cold winters and mild summers. Cool season grasses include the following:  Kentucky bluegrass, is a fine, dark green grass that grows well in shade.
The erector spinae or spinal erectors is a set of muscles that straighten and rotate the back.
Lumbar spinal fusion is an operation that causes the vertebrae (bones of the spine) in the lower back to grow together. The goal of the lumbar fusion is to have the two vertebrae fuse (grow solidly together) so that there is no longer any motion between them.umbar spinal fusion is an operation that causes the vertebrae (bones of the spine) in the lower back to grow together. The goal of the lumbar fusion is to have the two vertebrae fuse (grow solidly together) so that there is no longer any motion between them.