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.
Most people have five vertebrae in their lumbar (lower back) region, which are named L1 to L5. However, some people possess an additional lumbar vertebra located below the L5.This extra vertebra, known as the L6, is called a transitional vertebra.ost people have five vertebrae in their lumbar (lower back) region, which are named L1 to L5. However, some people possess an additional lumbar vertebra located below the L5.