Below are some links to resources that can help to guide you through the tree planting process.  

A few crucial points to consider are:

Right tree, right place.  Thoroughly consider the location and species relationship before planting.

Choose a small tree.  Look for a tree with a favorable root to stem ratio. Do not purchase a large tree with a small root ball.

Choose a quality tree with a healthy root flare, do not select a tree that has excessive girdling roots.

Plant the tree with care.  Gather your tools and supplies and carefully follow tree planting instructions below. 

Great tree planting instructions:

https://www.treesaregood.org/Tree-Owner-Resources/Planting-a-Tree

Very thorough evaluation of tree species on the front range:

https://assets.bouldercounty.gov/wp-content/uploads/2017/03/Frant-Range-Tree-Recommendation-List.pdf

A short list of trees that we recommend:

Shade trees-  Kentucky coffee, linden, honey locust, burr oak, swamp oak, sugar maple, catalpa

Ornamental trees- hawthorn, Amur maple, serviceberry, gambel oak, pinion pine