1. What could be causing spots on the leaves of aspen trees and what is a recommended treatment? Updated: February 14, 2012
2. Will a Kentucky coffee tree do well at an altitude of 6300 ft. I live in Parker Colorado. Updated: February 14, 2012
3. What is the height range for crabapple trees? Updated: January 24, 2012
4. 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
5. Are there long-term effects of drought on trees? Updated: January 24, 2012
6. In what soils do aspen perform the best? I live in Colorado. Updated: January 05, 2012
7. What ithings should be considered before planting a large deciduous tree in the landscape? Updated: January 05, 2012
8. Is fall a good time to plant tree? We are new home owners in Colorado. Updated: December 01, 2011
9. What is the mature size of a piñon pine tree? Updated: November 28, 2011
10. What is the proper procedure for dealing with a cavity in a tree trunk? Updated: November 25, 2011
11. What are the bright orange, jellylike, tendril-covered balls on the junipers? Updated: November 20, 2011
12. Why should I consider planting a flowering crabapple? Updated: November 20, 2011
13. I want a crabapple tree that is hardy for Zone 3, that drops its fruit, and is disease resistant (Red Cedar are nearby). It would be for the deer to feed on. Updated: November 17, 2011
14. Can I save a Russian olive that fell down during a late-spring snowstorm? It is totally horizontal, with most of the root-ball exposed. Updated: November 15, 2011
15. I have some red pine seedlings in containers,will they survive if left outside in containers through the winter months? Updated: November 15, 2011
16. This spring we planted some new trees in our yard. Do they need to be fertilized and mulched? Updated: November 09, 2011
17. Why is the live oak called "live"? Updated: November 09, 2011
18. We want to plant some mid-sized trees on a slightly sloping, grassy area. What can you recommend? We live in Colorado. Updated: November 07, 2011
19. We planted several young trees last year. Is there anything I can do to help them get through the rest of the winter? Updated: November 07, 2011
20. I planted several young trees this year. What can I do to get them through our Colorado winter safely? Updated: November 07, 2011
21. What trees are commonly affected by wetwood? Updated: November 06, 2011
22. Are Little Giant cedars suitable for Minnesota? I seem to have read somewhere that they are Zone 6 or 7. Updated: November 06, 2011
23. What steps do I need to make prior to selecting an evergreen tree for my landscape? I live in Colorado. Updated: November 04, 2011
24. I want to cut and bring branches into the house to bloom during the late spring. I have a variety of shrubs and trees; which will work best? Updated: November 01, 2011
25. How do I control suckers in my aspens/silver poplars? Updated: October 31, 2011
26. How do I determine the sex of a holly plant? I have a female and I'd like to buy a male. Updated: October 31, 2011
27. Roots of several oak trees are being disturbed due to road and sewer work. How can I help the trees? Updated: October 29, 2011
28. How big a hole do I need to dig for my new tree? Updated: October 29, 2011
29. I bought a house and Colorado and want to plant some trees this fall. What trees do you recommend? Is planting and care different during the fall? Updated: October 29, 2011
30. If you carved your name in a young tree about 4 feet from the ground. When the tree is 250 years old, how far would your name be from the ground? Updated: October 25, 2011

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