1. What's wrong with a small Colorado Blue Spruce that's losing needles from the bottom up and mottled with yellow needles here and there? I live in Minnesota. Published: November 17, 2009
2. When I prune my tree, should I paint or otherwise treat pruning cuts? Published: August 26, 2009
3. I will be having some new trees planted by my handyman and he told me to buy root stimulator with vitamin B1 to improve rooting. Is this a necessary expense? Published: August 26, 2009
4. Piling mulch up against the trunks of trees and shrubs helps to keep them cozy warm all winter long. Published: August 26, 2009
5. Our local garden center told us that newly planted trees should have their trunks wrapped with paper tree wrap to prevent sunscald and insect entry. Is that really necessary? Published: August 26, 2009
6. Are Katusura trees suitable to grow in Colorado Springs? Published: October 28, 2008
7. Are Canadian Hemlock (Tsuga canadensis) trees suitable for Colorado? Published: October 28, 2008
8. Are pin oaks recommended for Colorado? Published: October 28, 2008
9. I think I read that Russian olive trees cannot be sold by nurseries in Colorado now. Is that true? What are the main reasons why these trees are not good in Colorado? Published: October 01, 2008
10. Small spider-like insects with long legs congregate on the trunks of my trees and sometimes form long lines of one insect following another - what are they? Published: September 15, 2008
11. When should I prune my Bradford pears and purple leaf plums? Published: September 14, 2008
12. What causes a dogwood not to bloom? These trees were transplanted from the woods 4 years ago and are actively growing, healthy, and are over 6 feet tall. None of the 5 trees that were transplanted have yet bloomed. Published: September 14, 2008
13. Can anything be done to save trees that have been planted too deeply? Published: September 14, 2008
14. Why do dogwood leaves look off-color, scorched, and unhealthy in summer? Published: September 05, 2008
15. Since moving from Texas to Ohio, I have been missing my crape myrtle trees. I had heard that Texas A&M was developing a variety that was more cold tolerant. Is there a variety that will survive in Ohio? Published: May 16, 2008
16. Can I use herbicide to control root suckers on my crabapple tree? Published: May 15, 2008
17. I live approximately 10 miles from the ocean in Texas. My magnolia tree has yellowed leaves year-round; what can I do to make the leaves turn dark green? Published: May 15, 2008
18. Which pear tree would be best in my back yard: Aristocrat or Bradford? Also, is it true that pear trees are an invasive species in Colorado? Published: May 15, 2008
19. Are Autumn Blaze maples considered weak wooded and easy to break in winter snows? I live in Colorado. Published: May 15, 2008
20. 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, but the branches have buds and some young branches. Published: May 15, 2008
21. Will the Thuja Green Giant tree thrive in Denver, Colorado? We'd like an evergreen. Published: May 15, 2008
22. What are the best Japanese cherry trees (with pink spring blooms) to grow in Colorado Springs, Colorado? Published: May 15, 2008
23. Why are some people in Colorado not allowed to grow cottonwoods in their subdivisions or city parks? Published: May 15, 2008
24. What is the difference between a Schwedler maple and a Deborah Norway maple? Published: May 15, 2008
25. When transplanting trees, does it take a large caliper tree longer to re-establish compared to a small one? Published: May 15, 2008
26. When is the best time to trim evergreen trees? Published: May 15, 2008
27. Why do my camellia flower buds turn brown and/or drop off of the plant before opening? Published: May 15, 2008
28. Is it common for a year-old Colorado Spruce to have several branches with dry needles? There is no evidence of insects. Published: April 22, 2008
29. I have a five year old Japanese lilac tree (Syringa reticulata). The tree is in the middle of a large annual planting bed and I add slow-release fertilizer for the annuals every spring. The tree has never bloomed. The tree has healthy, green foliage. Published: March 05, 2008
30. How close to the house foundation can an aspen be located? Published: March 04, 2008

Didn't find what you were looking for? Try asking one of our Experts.