The first cut of the day in Kendall happens while the dew is still heavy enough to darken your boots. Out toward Kendall Indian Hammocks Park the oaks hold the cool a little longer, and St. Augustine grass takes a blade cleanly before the heat sets in. AJ Tuff Lawn Service Inc. works those hours — mowing, edging, string trimming and blowing the walks and drives clear so a yard looks finished rather than merely cut. The reward comes when the mower shuts off and the street goes quiet again, with one sharp line running the whole length of the sidewalk. That line is the entire point.