Family Owned for Over 45 Years

Denison Landscaping 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 29 landscape organizations in the country.

Currently, Denison Landscaping 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 45 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. Denison Landscaping is proud of our employees and we value being an active participant in our community for over 45 years.

Wholesale Nursery

Denison Landscaping is the parent company of Abby Farms Wholesale Nursery which offers over 400 varieties of Perennials, Grasses, Shrubs and Trees on 300+ Acres.

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.’”

Over 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, PA, Delmar, DE, and Milton, DE. We operate throughout the Mid-Atlantic (DE, MD, VA, WV, and Washington DC) 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.

John DenisonJohn Denison: 1955 – 2017

It is with great sadness that we announce the passing of John P. Denison, the founder of Denison Landscaping and the face of the Company for over 45 years. John’s unwavering drive and dedication to the Company, its employees, customers, vendors, the Green Industry, and his surrounding community was truly incredible. Through his hard-work, John grew Denison from a single lawnmower to one of the top 25 landscaping business’ in the U.S. However, none of this would have been possible without your support and the continued trust that you placed in Denison over the years.

The Denison family and its employees intend to honor John’s legacy through our continued commitment to you. We remain dedicated to providing the best services, building lasting relationships, improving the surrounding community, and exceeding customer expectations. Below is Denison’s Mission Statement which will guide us moving forward:

“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.”

Thank you again for your continued support, and if there is anything we can do to improve our services to you please do not hesitate to contact us.

The Denison Family