About Arbor Day
Arbor Day is celebrated each year on the last Friday of April and Arbor Month is celebrated throughout May. This is a time to recognize the many benefits that trees provide to our health, well-being, and environment and take action to care for and plant trees. Arbor Day 2025 is Friday, April 25.
Planting trees for a changing climate
Minnesota’s changing climate is affecting what trees will thrive in our area. Planting a diversity of trees will make our communities more resilient to climate change.
- Order or download a copy of the recommended trees booklet to help develop a planting plan.
- Learn more about trees and a changing climate (PDF) from the Minnesota Department of Natural Resources.
As the climate in Minnesota shifts, it is important to plant trees that will thrive in the future. Consider trees of the following species for planting in Hennepin County:
- Bur oak
- Dutch elm resistant elm varieties
- Ginkgo
- Horse chestnut
- Kentucky coffeetree
- Northern catalpa
- Ohio buckeye
- Shagbark hickory
- Swamp white oak
- Turkish hazelnut
- Yellowwood
Be sure to plant the right tree for your planting location. Consider the mature height and spread of a tree when making your choice.
How to plant trees
Once you have a tree, it’s important to plant it correctly to ensure it stays healthy and strong for years to come. Follow these tips from the Minnesota Department of Natural Resources to help you plant trees.
Printable pocket guide to planting trees (PDF) from the Minnesota Department of Natural Resources.
How to plant a bareroot seedling
Watch this short video (2 minutes) to learn how to plant a bareroot tree seedling.
How to plant a tree that comes in a container
Watch this short video (2 minutes) to learn how to plant a tree that comes in a container.
How to keep mature trees safe and healthy
Be aware of root zones when installing or expanding patios, decks, sidewalks, and driveways
Planning to install a patio, deck, sidewalk, or expand a driveway? Be aware of the root zones of mature trees. Remember that the roots keep your beautiful mature tree healthy and hydrated. Plan your project around the roots of the trees and avoid cutting into or paving over roots whenever possible.
Protect mature trees during construction projects
If you have a construction project coming up, incorporate protecting mature trees as part of the planning process rather than cutting them down. Careful planning can minimize negative impacts on existing trees. Learn more from the University of Minnesota on protecting trees from construction damage (PDF).
Treat some species of trees to keep them healthy
Ash trees are a common urban landscaping tree – there are more than 1 million ash trees in yards, parks and streets in Hennepin County. That’s about 15 percent of the tree canopy. All ash trees in the county that are not being treated will likely infested with emerald ash borer, an invasive tree pest from Asia that kills ash trees.
If you have ash trees on your property, it’s time to start thinking about what you’re going to do to treat or remove them. Treatment with an insecticide is an option to preserve ash trees of high value. A mature ash tree that is healthy, at least 30 inches in circumference (or 10 inches in diameter) at chest height, and of value to the property owner may be worth saving. If you decide to treat your ash trees, treatment should begin immediately. Learn more about emerald ash borer.
There are often ways to preserve that are threatened by disease. Whether you are treating or removing your trees, you should work with an ISA-certified arborist. These arborists are trained in proper tree care by the International Society of Arboriculture. Learn about working with an arborist (PDF) and find an ISA-certified arborist near you.
Calculate the benefits of trees near you
Calculate the benefits of trees near you using the tree benefits calculator.
To calculate the benefits, first identify the tree species. Use our neighborhood tree bingo (PDF) and tree identification guide (PDF) to help figure it out!
Then, measure the tree by wrapping a measuring tape or string around the tree about 4.5 feet off the ground (about chest height) to get the circumference. Divide the circumference by 3.14 to get the diameter.