April in Cobb County starts yellow — pine pollen on every hood and windowsill — and ends in dogwood white and redbud pink. Hannah Outdoor Designs times the year to that turn: winter cleaned out of the beds, fresh mulch laid, borders edged into shapes that hold their line, mowing underway as soon as the ground dries. The pleasure is in the framing, a lawn that reads as one plane of green because everything around it has been given a clean boundary. Through summer it is steady maintenance — cut, trim, blow, repeat — and in fall the leaves come off before they mat down. A front yard in Smyrna can look composed all year, and that is the aim.