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About Us 

Washington Tree Service, Incorporated is a locally owned and operated family business built on a history and reputation of delivering excellent customer service through honesty and integrity. We sell and provide tree, shrub and lawn care programs to a growing number of homes and business in the Puget Sound region. Our primary goal is landscape enhancement through the combination of advanced environmental technology and delivery systems. Our flexible and adaptable programs are specifically designed to meet the needs of our market and achieve customer expectations which produce longevity of service and result in customer satisfaction and peace of mind. 


We enhance the health and beauty of Puget Sound Landscapes through experience and technology.

Our History


1948 – Jack Pitts, and his son-in-law Stan Raplee, turned their love of big beautiful trees into a business and Washington Tree was born.

1950 – More caterpillars than you’ve ever seen hit the Seattle area! Stan and Jack figure out a way to get rid of them, and the pest control side of the business takes off.

1963 – Jack and Stan expand again, this time into lawn care.

1967 – Jack retires but the business continues to thrive under Stan’s leadership.

randy-300x232.jpg1974 – Stan admits he can’t live forever and picks a new general manager, his protégé, 30-something Ed Walter (a distant relative).

1974 – Randy Mock, a 23-year-old friend of the family, joins the Washington Tree & Lawn Care team as a helper on a spray truck … and never leaves!

1980– Randy takes over the Lawn & Weed division.

1986 – Ed co-founds Washington Friends of Farms & Forests, to encourage and build dialogue and unity between pesticide companies and environmental advocates in Washington State.

1992 – Ed works with then-State Senator Patty Murray to write new legislation on pesticide-sensitive registries.

1997 – Ed takes the helm from Stan, becoming president and CEO.

2004 – Washington Tree & Lawn Care introduces their natural/organic yard care system. (Yep, we went green before it was popular.)

2015 - Ed retires and Washington Tree & Lawn Care merges with Senske Services.

tommoores-300x202.jpgToday – Though owned by Senske Services, we continue to do business under the Washington Tree & Lawn Care name, keeping the legacy of stellar customer service thriving.

The rest of our staff? First, they’re not called employees. They’re team. They’re family. Thirty percent have worked here more than 20 years. Ten percent have worked here more than 30 years.