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What You Can Do

Trees need your help

YOU have an opportunity to make history by helping reforest Boulder!

Make a plan for your trees 1. Plant 

Adding new trees to your property is one of the most important ways you can support Boulder’s canopy restoration. Trees are a great investment both in your future property values and in Boulder’s ecosystem vitality. If every property owner and resident participate in this tree planting campaign, we can restore our tree canopy from this catastrophic loss over the next 10-20 years. 

Owners:  If you have the space and means to plant one or more trees, please add tree planting to your landscaping to-do list this year. Consider requesting a FREE street tree  to be planted in the public street right-of-way adjacent to your property. Please consider volunteering or contributing to Boulder’s Tree Trust .

Information on the tree sale will be posted here when it is available.

Renters:  Offer to support your landlord in planting or caring for a new tree. Please consider volunteering or contributing to Boulder’s Tree Trust. 

Plant your own tree, hire a tree planting professional to do the planting, or contact the  Tree Trust for advice and/or assistance.


Plant a Tree 2. Protect

Existing trees on your property need care and protection to provide optimal benefits to you and our surrounding ecosystem.   

You can prevent avoidable tree loss or damage by following these simple guidelines: 

  • Water and mulch:  Always water young trees once weekly during high heat or low precipitation periods for the first 3-5 years after planting. Maintain mulch to retain moisture and temperature. Water existing trees during winter and when precipitation levels are below normal. 
  • Monitor:  Have a licensed certified arborist visit your property every 2-3 years or at the first sign of tree disease, insect infestation, or decline, to ensure your trees are healthy and thriving. They can often spot tree health concerns and recommend corrective options before issues become severe.  
  • Root protection:  Protect your trees from vehicle, excavation and construction / development damages. Consult a licensed certified arborist before developing any construction plans for your property.  
  • Tree canopy protection:  Trees located around driveways or city streets are especially susceptible to damage from tall vehicles. Keep trees pruned to prevent damage to overhead limbs. 

Every tree you protect from damage or destruction is one less tree in need of replacement! 

Get involved ​3. Diversify

Diversifying Boulder’s tree canopy will make it more resilient.  

Our goal is to avoid having any single tree species exceed more than 5 percent of our canopy in your neighborhood and across the community. Relying too heavily on any single species of tree, no matter how well suited to our environment it is, makes our urban forest vulnerable to invasive tree insects and diseases.  

Over the past 50 years, Boulder has lost thousands of trees to species-specific insects or diseases, including American elms to Dutch elm disease, walnuts to thousand cankers disease, and now ash to EAB. When these trees represent a significant percentage of the tree canopy, such as ash do (at nearly 25 percent), the impact to the overall canopy is dramatic. 

4. Plan

Consult an arborist to make a plan for the trees on your property. 

  1. Identify ash trees on your property.   How to identify an ash tree (video)
  2. Contact a licensed certified arborist to evaluate your ash trees and determine whether chemical treatment or removal is the best option.   
  3. While onsite, seek advice on how to best care for and protect your other trees. Schedule any pruning, treatments or removals.  
  4. Plan for replacing any removed trees and adding new trees to enhance your property and health. 

5. Participate

You can help Boulder's tree canopy become healthy, diverse, and sustainable.

Volunteer to plant trees or do other forestry work in parks and other public spaces.  Volunteer Opportunities
Join the Tree Trust and become a Tree Tender. Help educate your friends, neighbors and community about EAB and the importance of a planting and diversifying our future tree canopy.
Donate to Boulder's Tree Trust
Sign up for our email list (link) to receive updates and newsletters related to urban forestry initiatives.