Get the Greenest, Healthiest Lawn on Your Street

Winter Special

Sign up for a Lawn Care Program & receive a Free Perimeter Pest Control Application.

*Just mention the OSI website when calling.

(NEW customers ONLY.  Offer expires  April 30, 2025)

Call For a Free Quote

701.222.3889

Residential

Keep your lawn looking its best with our professional lawn care services. We offer lawn fertilization, weed control, perimeter pest control and tree & shrub spraying and fertilization; all to maintain a lush, healthy yard.

Request A Quote

Commercial

Maintain a professional, well-manicured look with our comprehensive lawn care services. Weed control, perimiter pest control, lawn fertilization and tree & shrub fertilization and spraying to keep your business’s landscape pristine.

Request A Quote

Our Services

Weed Control

Keep weeds at bay and your lawn lush with our weed prevention services. Our experts will treat your yard to ensure a healthy, vibrant landscape.

Fertilizer

Revitalize your lawn with our professional fertilization service. Our tailored treatments nourish your grass, promoting thick, green growth all season long.

Outdoor Services Inc is proud to be a 100% locally-owned company, serving Bismarck/Mandan & surrounding communities since 1985!

Home-grown owners & staff are the key to our continuing success!  We consider our customers to be friends & family.  They trust their landscapes to us & we treat them like our own!

From Lawn & Tree Care to Perimeter Pest Control, OSI has got you covered!

Call (701) 222-3889

We currently serve 4000+ residential & commercial customers.  We’d like the opportunity to make your property look as nice as the others we tend.  We believe success depends on satisfying one customer at a time!

Dennis W.

“Dear Lawn Lady,  Since the weed man has been here a few times, my weeds are gone much better now!”

Connell

“Like seeing our weeds disappear and our lawn looking so good each day.” 

J. Carson

“Very pleased with the technician. He was friendly and answered all of my questions.  We will be recommending OSI to friends, thanks to him.”

Jason L.

“I appreciate all of your services and how quickly you get out to provide the service.  Lawn looks good!”

Shawna D.

“I have been very satisfied with my service.  My lawn is the best it has ever been!”

Marlyss W.

“Our technician is very friendly & helpful.  He came to the door to say he got here & then when done, to tell me exactly what he did.  I appreciate that.  Kudos to that technician!!”

Click Here

Rasmussen College

“Your employees have mastered the art of customer service!”

Shawna

“My lawn is growing like crazy.  It looks really healthy and green.  I love my lawn for the first time in 8 years.”