Shreveport in high summer means crape myrtles blazing along the boulevards and heat shimmering off the Red River by midafternoon. Jewitt Lawn Service keeps city yards holding up in that heat, mowing and trimming lawns and edging until the lines along driveways and sidewalks are sharp enough to notice from a passing car. The older neighborhoods here are full of big shade trees and deep front lawns, and every one of them shows a fresh cut right away. Even in the dog days of August, when the grass seems to grow by the hour, a well-kept Shreveport yard holds its shape. It is city lawn care with a stubborn streak about getting the edges right.