Trees & Community Forestry

Trees in the fallWhy Trees?

Everyone benefits from the silent work that trees perform around the clock:

  • Cleaner air
  • Improved water quality
  • Habitat for wildlife
  • Shade
  • Increased property values

Community Resources

About

Emerald Ash Borer (EAB) is an invasive insect pest that aggressively spreads and kills green ash trees. EAB was confirmed in Fridley in 2019, and since then outbreaks have been confirmed throughout the city. The larvae of EAB tunnel under tree bark, which interrupts the flow of water through the tree. Once symptoms are present, the ash tree typically dies within one to three years. If you have an ash tree on your property, act now to treat or remove it before the tree becomes a safety hazard. 

Learn more about how EAB kills ash trees.

Ash Tree ID

Ash trees are one of the most common shade trees in Fridley. An estimated 30% of the City's publicly owned trees are ash with thousands more located on private property. To tell if you have an ash tree, look for:

  • Diamond- patterned bark on mature trees
  • Leaves and branches that are opposite each other
  • Leaves comprised of small leaflets

Ash Tree LeavesAsh Tree Bark

Ash Tree ID Guide


What to Do About EAB?

If you have an ash tree in your yard, assume that it will become infested with EAB and die without intervention. Due to the ubiquity of ash trees throughout the city, the impact of EAB in Fridley will be devastating without resident help. If you have an ash tree, you may choose to:

1) Treat your ash tree
2) Remove (and replace) your ash tree

Due to the shade, air quality, and water quality benefits provided by mature trees, the City recommends treating ash trees that are:

  • Over 10 inches diameter
  • In a good location
  • Not exhibiting advanced EAB symptoms (>30% canopy loss)

Although trees must be treated every 2-3 years, it is usually more cost efficient to treat the tree long-term than remove it.

Treating Your Ash Tree

You can protect your tree against EAB infestation using chemical treatment. Chemical treatment must be reapplied every two to three years. Do not wait until the tree is exhibiting symptoms of EAB to start treatment as the damage may be irreparable and the tree too far gone. Treat the tree using a systemic chemical injected by a Fridley-licensed tree company. Some chemicals used to treat EAB can be harmful to beneficial insects such as pollinators if applied improperly. Systemic injections are the most effective form of treatment and are the least likely to adversely impact pollinators. Avoid using treatments that are applied as soil drenches, which can leach into water or drift to pollinator habitat.EAB Treatment

Questions?

If you have questions about trees in Fridley, please call 763-572-3566.