John DenisonJohn Denison: 1955 – 2017

It is with great sadness that we announce the peaceful passing of our founder, CEO, brother, father, friend, and boss, John P. Denison on May 25, 2017. John was a loving, caring, and passionate person whose singular goal in life was the happiness and success of his family and all of those around him. He will be missed but never forgotten.

The Denison Landscaping family will continue to honor John Denison’s memory by providing the highest quality service to our customers just as we have done for the past 44 years.


Denison Landscaping & Nursery Inc. is a family-owned and operated full service Landscape contractor in the Washington, DC./Baltimore Mid-Atlantic Region since 1973.  The Denison family has been growing our organization and over the last few years we have been named in the top 50 and, more recently, in the top 26 landscape organizations in the country.

Currently, Denison Landscaping & Nursery, Inc. services the Mid-Atlantic region, which includes the Eastern Shore and Pittsburgh, providing a full range of landscaping services from Commercial and Residential Design Build to Irrigation, Maintenance and Enhancements and Wholesale Division while operating over 750 acres of Nursery production.

When You Hire Denison, You Get Denison

When you hire Denison Landscaping you will have peace of mind in knowing that only Denison employees will be working on your project. Unlike many of our competitors, we do not bid out your project to the lowest bidder. This means that you will always have the quality and service that has made Denison Landscaping a one-of-a-kind company for 40 years. It’s always been that way and it will always stay that way. That is the “One Company, One Family Guarantee”.


Why Choose Denison?

The Denison Group prides itself on a History of Leadership as a full service provider in the landscaping industry.  We believe in building and keeping productive relationships with our customers by making every effort a team effort.  Our team sees every day as a new opportunity to deliver the best because our reputation demands the best.

Celebrating 40 Years!

John Denison found that a way to make money to pay for college became a passion. He had a pickup truck named “Chuck” and a mower.

“He decided landscaping was the thing for him,” says Josh Denison, operations and human resources manager for the Ft. Washington, Md.-based operation and the son of the company founder. “His second year cutting grass, he had a customer ask him to plant some azaleas. He decided, ‘I like this planting stuff more than I like this maintenance stuff.’”

Four decades later the company has more than 250 trucks on the road, trucks that drove a combined 24 million miles last year. Employees laid 18,197,000 square feet of sod.

Read the full article from Landscape Management magazine

Denison’s 40 year milestone was also featured in US Builders Review.  Here is a snippet…
What started out as a three-man operation has blossomed into a full-fledged landscaping company. “Today, during peak season we employ anywhere from 400 to 470 individuals,” shares Josh Denison, operations manager at Denison. “We have offices in Pittsburgh and additional branch locations in Delmar, Del. We operate throughout the Mid-Atlantic in all phases and facets of what we do from commercial installation to residential design-build and snow removal.” Read the full article in US Builders Review.