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 Planting & Transplanting
What To Do With Christmas Trees After The Holidays
January 4, 2022
What To Do With Christmas Trees after the Holidays
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.
What Are Zombie Trees & Signs You Have One
October 31, 2024
Learn how to identify zombie trees in your yard, understand what causes them, and discover tips for saving or removing zombie trees before they pose a risk.
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!
Leaf & Needle Problems
What to Do When Your Japanese Maple Has Crispy Or Brown Leaves
August 17, 2022
Spot brown, crispy or scorched leaves on your Japanese maple? It could be Japanese maple leaf scorch, an underwatered Japanese maple or pests!
Property Maintenance & Landscaping
How Long Do White Fluffy Seeds Last on Cottonwood Trees?
May 9, 2022
Those white fluffy seeds in the air in spring are cottonwood seeds! But how long does cottonwood season last? Cottonwood trees shed cotton for several weeks from late spring to early summer. But can you stop them from producing cotton? Here's how to reduce or stop it entirely.
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