About Happy Roots


Thank you for visiting Happy Roots.  If you need excellent, reliable service on the landscape of your property, you have found the right company.  We specialize in outdoor residential property care.  Our services include weekly lawn mowing, fertilizer programs (which include aerations), sprinkler blowouts, sprinkler start-ups, landscape and sprinkler consulting, tree and shrub pruning, weed control, soil amending and many other maintenance needs you may have.  We will help you maintain the investment of your beautiful landscape.  The goal of Happy Roots is to provide you with excellent customer service and create results that will make your neighbors call us.

Happy Roots is owned and operated by Les & DeAnna Cowan.  Let us apply our experience and knowledge to help you improve the overall health and appearance of you lawn and property.  We will save you time, money and water by teaching you how to assist in the maintenance of your property and sprinkler system after we have completed our services.  Don’t hire just anyone to take care of your property, hire someone who cares as much as you do.  We will work with you to get excellent results, and show you just how easy it is to grow and maintain a beautiful landscape, without selling you anything that is unnecessary to achieve great results.

We look forward to serving you!

Happy Roots Logo

Happy Roots is a residential full service lawn, tree, shrub and sprinkler maintenance company. We service properties all over the northern Denver Metro area, including Thornton, Northglenn, Westminster, Broomfield, Arvada, Lafayette, Louisville, Erie, Brighton, Henderson, and Reunion. We only offer services that have been proven to work over the years, to bring out your landscape’s full potential.  Our services are simple and cost effective, meaning the cost of our treatments and our advice will save you a lot of money in the long run.  Our services include weekly lawn mowing, core aeration, fertilizing, weed control, tree and shrub pruning, sprinkler system repairs, soil amending, consulting, yard clean-ups, and sprinkler blow-outs or winterizing and more.

Happy Roots has been in business since 2005, but our experience goes well beyond that.  Owner Les Cowan, has worked and trained in residential, commercial, and municipality landscape and sprinkler maintenance since 1994.  Owner DeAnna Cowan has been helping run the business since it’s inception, doing a little bit of everything, even mowing when we first started out.  She is a vital part of the business and our customers love her.  Our staff is the best at getting a lot of work done with great quality, and they take a lot of pride in their work.

All of our experience is available for our customers to tap into.  It’s our desire to serve each of our customers with the heart of a teacher, and make sure that their property looks the best it possibly can.  It’s also important for us to build a relationship with each of our customers, which proves to be challenging as we grow, but will always be part of our mission.

Residential Lawn Mowing, Aeration, Fertilizer Programs, Sprinkler Maintenance, and Property Care

Serving – Thornton, Broomfield, Westminster, Brighton, Erie, Lafayette, Louisville, Henderson, Northglenn, Arvada, Reunion, and Parts of North Denver.

Owners – Les & DeAnna Cowan


  • “Happy Roots is the best company I have worked with in a long time. They are truly a service company and know how to treat their customers… I always know when they are coming, what they are doing and the cost associated with their service. They are always on time & deliver excellent quality. I highly recommend the company.”

    Randy K.
    Westminster, CO 80031
  • “…I was afraid I was about to lose both front and backyard lawns, but after just 3 applications (I opted for the Gold service), my lawn is heading into winter looking great!…”

    Heidi W.
    Thornton, CO 80229
  • “I’ve been working with Happy Roots for over a decade and throughout that time their care of my lawn/yard and overall customer service has been outstanding. Highly, highly recommended!”

    Beau F.
    Thornton, CO 80602
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