1. Should we believe my dad and buy fast-growing silver maples to shade our house? He said all we have to do is to have them "topped" regularly to make them less hazardous. Updated: January 24, 2012
2. Why is so much sap falling from my oak trees this year? It is everywhere — cars, decks, windows, etc. Updated: January 20, 2012
3. What ithings should be considered before planting a large deciduous tree in the landscape? Updated: January 05, 2012
4. Why won’t flowers or grass grow at the base of a tree infected with wetwood? Updated: September 28, 2011
5. What environmental conditions foster aspen leaf spot? Updated: September 28, 2011
6. What are some different varieties of trees that could be planted as an alternative to aspen? Updated: September 19, 2011
7. What is the method to get apple trees to set fruit? Updated: August 22, 2011
8. Something is attacking the inside trunk of our Arizona ash tree. It looks like brown dirt in the rotted part. What could cause this and what can be done? Updated: June 29, 2011
9. My trees are not growing as fast as I think they should. How do I know if a nutrient deficiency might be present? Updated: May 12, 2011
10. My Colorado blue spruce trees have this years needles being consumed by a small inch worm. Updated: April 16, 2011
11. I have a horse that eats bark off trees. Is this bad for him? Updated: July 20, 2010
12. Can evergreens be planted in wet spots in the lawn? Updated: July 08, 2010
13. My Silver maple and Amur maple seem to get yellow leaves every year by August. The affected leaves are mostly at the ends of branches. Leaves stay green along the veins but turn yellow on the rest. They just look sickly and are not growing much. Will fertilizer help? Updated: July 07, 2010
14. By winter's end, Ponderosa pine and Junipers in our yard seem to turn an ugly brown. It looks like most of the inner needles are affected. Updated: July 07, 2010
15. The leaves on my Sugar Maple tree developed large, dry, brown patches. What do you think caused that? Updated: July 02, 2010
16. Where should I place my evergreen or deciduous trees? Updated: July 01, 2010
17. My Ash tree is doing poorly and looking like there are holes in the trunk, what is wrong? Updated: July 01, 2010
18. What trees grow well at high altitude? Updated: July 01, 2010
19. Why are my Pinyon Pine trees stressed and dying? Updated: July 01, 2010
20. My ponderosa pine tree is dying. How can I save it? Updated: June 30, 2010
21. What is the best way to care for a Norfolk Island pine? Updated: June 30, 2010
22. When should I fertilize my fruit trees? Updated: June 29, 2010
23. Why do squirrels feed on trees and what can I do about it? I live in Colorado. Updated: June 29, 2010
24. A cottonwood seedling came up in our yard. For many years, it produced no cotton. The past few years, the cotton has become very annoying. Is there anything to stop the cotton from developing? Updated: June 29, 2010
25. After the leaves on my aspen tree fell, I noticed the twigs have many bead-like swellings on them. What causes this? Updated: June 29, 2010
26. What trees can I plant in Denver? Updated: June 29, 2010
27. What can I do about exposed tree roots in my lawn? Updated: June 28, 2010
28. What is the reason that woodpeckers or flickers make constant hammering or drumming noises? Updated: June 28, 2010
29. How do insects participate in the infestation of Dutch elm disease? Updated: June 28, 2010
30. How do I know if my pine trees are infested with the mountain pine beetle? Updated: June 28, 2010

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