Company History

Acorn Tree Service was started in 2001.  We serve all of Door County as well as outside the county for larger jobs, municipalities, colleges or clients with personal property.  We have a fleet of chip trucks, stump grinders and 2 aerial lifts.  Our team of 7 local employees comes with a wealth of knowledge and experience.


In 2005, Acorn Tree Service started manufacturing landscape mulches.  We are one of the largest suppliers and producers of pure high grade garden mulch from 100 percent local forest products.


Acorn Services Delivers mulch all over the county.  Installation is available.

About the Founder

Andy has been in love with the outdoors since he was a small child. His first visit to Door County at age 8 in the winter of 1971 left a big impression on him. He distinctly remembers the beautiful view from the top of the Ellison Bay hill, and from that moment, he learned to appreciate what a good view means.  He spent summers on the family farm in Ellison bay. When he turned 14, he was handed a Stihl O28 chain saw and given instructions to remove the 10 acre Montmorency cherry orchard that was aging and unproductive. As a replacement, he helped plant 40,000 white pine trees which he still maintains to this day.  He also spent summers in high school helping the cherry orchard crews on a nearby farm harvest 300 acres of tart cherries across northern Door County with a Friday Limb shaker.


In 1982, Andy started a charter fishing business which he ran successfully and safely for 18 years.  He spent the off season fishing commercially for the Hickey Brothers Fisheries in Baileys Harbor. Andy logged over 16,000 hours on the water and carried over 20,000 passengers for hire.


In the mid 90s, Andy returned to school and received a BA in Business Administration/Finance.  After a brief career in insurance and financial planning, he realized he needed to work in a three-dimensional setting.   This realization came true when Andy’s Sturgeon Bay neighborhood was destroyed by straight line winds.  He helped the neighbors clean up their disaster.  Soon, word was out and he was receiving more calls for tree work than financial planning. Shortly thereafter, Acorn Tree Service was incorporated in 2001.


When Andy is not climbing trees, he spends time with his wife, Tammy, four children, and lab Bogie.  He loves to fish, hunt, boat, and jet ski throughout the waters of Door County.

Andy Hartman, Founder & Lead Foreman


 Andy has been in the tree business for over 16 years and is an ISA Certified Arborist® and ISA Tree Risk Assessment Qualified. Recently he received certification for the Emerald Ash Borer disease which is not only hitting Door County badly but the entire country.  He has a BA in Business Administration/Finance from the University of Wisconsin/Green Bay. He has passed both the Series 6 and 7 S.E.C. General Securities Representative exams.

About Our Storm Response Work

We also respond to storm damage

across the country.

Acorn Tree Service has sent crews to:


01 Oshkosh, WI  Windstorm

02 Kansas City KS/MO ice storm,

03 Lexington,  KT Ice Storm

04 Portland OR/ Vancouver, Wa Ice Storm,

05 Big Bear, CA Pine Beetle Dieoff

06 Memphis, Tn Windstorm

07 Wichita, KS ice storm,

08 Hurricane Katrina -New Orleans LA / Slidel, MS

09 Tulsa, OK Ice Storm

10 Omaha, NE Council Bluffs IA Wind Storm

11 Hurricane Gustav, Baton Rouge La

12 Hurricane Ike, Houston Texas

13 Hurricane Sandy, NY, NJ, PA

14 Augusta GA, North Augusta SC,  Ice Storm

15 Greensborro, NC,  Ice Storm



    Thank you so much- the view is amazing!  We know the next step will make it even more beautiful! You

    are a true professional!  We loved working with you.

    Tom and Leslie Straus

    Fish Creek



    Work was completed in an outstanding manner as usual!  Thank you!

    Paul Jirtle

    Northeast Wisconsin Technical College



    Again, thanks for a job done right!

    Kathie Norgaard

    Ellison Bay

    (Read More)


Free Estimates

Acorn Tree Service will meet you on site and give you the best recommendation for your lot and health of your trees, all free of charge. Contact us today!

Home | Services | About Us | Contact | Resources        Andy Hartmann  •  Acorn Tree Services of Door County, LLC.       (920)495-0600