Early spring is often considered the right time to plant trees in Colorado, but Fall works well as long as the trees are planted by mid-October. With Aspens, the most important factor is the soil. Aspens need moist soil that drains well and is more acidic. They can not tolerate dry soil, heat, or drought. Plant aspens on northern or eastern slopes, or northern or eastern sides of your house, rather than sunnier areas. Also, be sure to protect the young tree from critters (deer, rabbits) with stakes and fencing.
Early spring is often considered the right time to plant trees in Colorado, but Fall works well as long as the trees are planted by mid-October. With Aspens, the most important factor is the soil. Aspens need moist soil that drains well and is more acidic. They can not tolerate dry soil, heat, or drought. Plant aspens on northern or eastern slopes, or northern or eastern sides of your house, rather than sunnier areas. Also, be sure to protect the young tree from critters (deer, rabbits) with stakes and fencing.