Shoulder Shrug Muscles. The shoulder shrug is a simple exercise to perform, and as the name suggests, it does work your shoulder muscles -- namely, the trapezius, or upper shoulder. Additionally, the shoulder shrug works muscles of your back -- the levator scapulae and erector spinae.
Oxalis makes a perennial ground cover in shady areas. Oxalis (Oxalis spp.), also called sorrel or shamrock, has a negative image if all you know of them are weedy, invasive cosmopolitan species. However, most of the about 800 species of oxalis are native plants in tropical South America and Africa or in temperate areas of the Old and New World. Many are used for landscaping or as houseplants. Oxalis are perennial plants but can give the appearance of annuals by going dormant in winter or during droughts.
At maturity, Gerbera daisy reaches heights of 8 to 24 inches, depending on the variety. Although Gerbera daisies are often grown as annuals, they are perennial in U.S. Department of Agriculture plant hardiness zones 8 to 11.Plant Gerbera daisy bedding plants in the garden when all danger of spring frosts have passed.t maturity, Gerbera daisy reaches heights of 8 to 24 inches, depending on the variety. Although Gerbera daisies are often grown as annuals, they are perennial in U.S. Department of Agriculture plant hardiness zones 8 to 11.