Knowledgebase
Replacing Tree? #926533
Asked March 22, 2026, 9:18 PM EDT
Boulder County Colorado
Expert Response
The best times to plant trees in Colorado are during early spring (March 15 to June 15) and fall (September 1 to October 15) for optimal growth and establishment.
An important consideration is the amount of water required by a newly planted tree. They require daily water based on the size of tree you plant. Size is the diameter of the trunk measured 6" above the soil line. As a rule of thumb it takes one season to establish a new tree for each inch of diameter.
Attached is the CSU Extension Garden Notes: Care of Recently Planted Trees. This includes information about watering needs and general care.
https://cmg.extension.colostate.edu/Gardennotes/635.pdf
I hope this information is helpful. If you need more information please contact us.
Regards,
Colorado Master Gardener
CSU Extension Boulder County