When the sun drops behind Mount Sanitas the east side of town goes into shadow all at once, and a well-watered lawn turns nearly black-green in that light. Onyx Lawn Care - Boulder works toward exactly that color: mowing on a consistent cycle, trimming close wherever the mower cannot reach, and edging every walk and drive so the shape of the yard holds all season. Aeration in the cool weeks opens up the soil, and overseeding fills whatever the summer thinned out. Spring cleanups clear the winter's debris, and fall means leaves, again and again, until the ash and maple have finished. Then the drive gets swept clear, and the yard sits there looking deep and even under the last of the light.