Whether you're picking out a tree for your landscape or making a list for this season's to-dos, we have your tree care questions answered.
Invasive Pest Alert for Illinois: Elm Zigzag Sawfly
May 1, 2025
The elm zigzag sawfly, an invasive species, is targeting elm trees in the Chicago region. Most trees recover from this pest, but weakened and stressed trees are at risk.
What You Need to Know about Watering Trees in Winter (Even in Colorado!)
January 16, 2018
Learn about if watering newly planted trees in the winter is needed, including if you should water trees in winter in Colorado.
Tree Selection Guide
Salt Tolerant Evergreen Trees (By Zone)
February 14, 2022
Winter salt can dry out evergreens, making their needles brown or yellow. Instead, select salt tolerant evergreens trees for the northeast region and each zone.
Tree Planting & Transplanting
What Plant Hardiness Zone Am I In?
December 15, 2022
Here's how to read planting zones and how to use plant hardiness zones, so you can get the best plants for your yard.
Tree Planting & Transplanting
What To Do With Christmas Trees After The Holidays
January 4, 2022
What To Do With Christmas Trees after the Holidays
Leaf & Needle Problems
What "Pine" Trees Lose Their Needles in Winter?
January 30, 2018
What pine trees lose their needles in winter, and when do pine needles stop falling? Over your pine shedding needles? Pick pine/evergreen trees that don't drop needles!
Trimming & Pruning
Can I Use a Hedge Trimmer or Pole Saw to Trim My Trees?
May 28, 2019
Learn about the trimming tools that work best on trees and the ones that don’t.
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