Broomfield sits on heavy clay, packed tight by wind, sun and years of feet crossing it. Aerascape, LLC opens that ground back up, pulling cores, mowing, feeding, letting April rain and snowmelt reach the roots instead of running off toward Big Dry Creek. Spring on the Front Range is undecided; a green week gets buried and comes back greener. Watching a thin, tired lawn thicken across a season is the whole reward of this work. By June the yard holds a color the plains around it never manage.