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 Stenosis and Scoliosis. Lumbar spinal stenosis and degenerative scoliosis often affect people age 60 or older, but they can also affect younger patients with developmental issues.