Kennewick · Lawn care
Lawn care in Kennewick, WA
Dry summers, hard freezes and weeds that return no matter what you pull. Colonial has looked after Tri-Cities lawns since 1985, and Kennewick sits inside the area our Richland office covers.

What we do for a Kennewick lawn
A healthy lawn needs more than a mower. It needs the right feed, steady pressure on weeds, enough water and attention to what is happening under the surface. Colonial covers all of that for Kennewick homes and businesses.
Mowing runs on a recommended cycle of every 7 to 10 days in the growing season, adjusted for the weather and for how fast your grass is actually growing. Fertilization, aeration and overseeding are timed to what the lawn needs, not to a fixed calendar.
Mowing, trimming and edging
every 7 to 10 days through the growing season.
Fertilization and weed control
preventive and post-emergent treatments in one program.
Grub control
preventive treatment, plus treatment where grubs are already at work.
Aeration, overseeding and dethatching
opens compacted soil so water and nutrients reach the roots.
Sprinkler maintenance
seven technician visits a season, start-up through winterization.
Perimeter pest control and tree care
pest control runs from the Tri-Cities office and tree and shrub care from Yakima, so ask what applies at your address.
Weeds, grubs and compacted soil
Kennewick lawns deal with dry heat, uneven watering, compacted ground and weeds like dandelions, bindweed, goathead, clover and spurge. Left alone, that mix turns a decent lawn into a project.
Our weed program pairs preventive treatments with post-emergent applications, so weeds are stopped before they establish and treated when they come through anyway. Preventive grub treatment keeps insects from hollowing out sections of turf, and where grubs are already present we treat them to help the damaged areas recover.
The Premium program includes six visits from a licensed technician, which puts a trained set of eyes on the lawn all season. Catching thin turf or a new weed patch early is easier than repairing it in August.
Safe for kids and pets
Our fertilizers are kid and pet friendly once they dry, and our pest control applications are pet friendly. If you have a question about a specific treatment, the technician or the office will tell you what is going down and when the yard is ready to use again.
Why Kennewick customers stay
Colonial has worked the same climate and the same soil since 1985. Technicians check your lawn's conditions and build the plan around what the grass needs, instead of putting one treatment on every yard.
One company handles mowing, fertilization, weed control, irrigation and pest control, so you deal with one office and one set of people who know Kennewick lawns. Customers point to the communication and the visible change in their lawns as the reasons they stay.
Kennewick lawn care questions
How often will my lawn be mowed?
Most Kennewick lawns need it every 7 to 10 days in the growing season. Grass type, growth rate and weather set the real timing.
Which weeds do you treat?
Dandelions, clover, bindweed, goathead, plantain, mallow, oxalis and spurge, among others.
Do you handle sprinklers?
Yes: maintenance, design, installation, repair, spring start-up and fall winterization.
Do you work on businesses?
Yes, residential and commercial properties in Kennewick and across the Tri-Cities.
Is every service offered at every address?
Not always. Call the Tri-Cities office to confirm what we offer at yours.
Your office
Call the office that covers Kennewick.
Estimates are done in person. Mon-Fri 8am-5pm.