Jacksonville is a patchwork of grasses: broad-bladed St. Augustine in front yards, fine zoysia here and there, and Bahia along the roadsides waving its little forked seed heads all summer long. Turf Tech Lawn Spraying Inc does lawn spraying across that mix, and spraying is work for calm air — the hush of early morning, before the sea breeze pushes inland and stirs the treetops. Each grass has its own texture and habits, and treating a lawn well starts with seeing which one is growing there. The aim is gradual and unshowy: a lawn that fills in thicker and more even over the weeks that follow. Come late summer, when the roadside Bahia has gone shaggy and seedy, the hope is a front yard standing deep green behind it.