Trees & Conflicts

1. Trees & Conflicts Vince Urbina

2. General Sherman Sequoia is the largest tree by volume in the world Still actively growing in Sequoia National Park and estimated to be 2,000 years old. It is 275 feet tall with a diameter of 25 feet.

3. The General Sherman Sequoia has everything it needs to thrive • No competition for sunlight • Little competition for water and nutrients • Genetically suited to the growing site • Minimal human interference to the tree • It is the; Right Tree, Right Place, Right Reason

7. Understanding Tree Roots Small absorbing rootsLateral roots Sinker root Taproot

8. Roots emerging from a cut root • White roots are new ones growing in response to the cutting • They are just one week old Photo by Edward F. Gilman, Professor, Environmental Horticulture Department, University of Florida

9. Roots after three years • About ten roots emerging from a cut root after three years may look like this • One or two are likely to become larger than the others in a few years from now Photo by Edward F. Gilman, Professor, Environmental Horticulture Department, University of Florida

10. Understanding Nursery Stock Available • Bud grafted trees(46%) Examples: Spring snow crabapple, Skyline honeylocust, Autumn blaze pear or maple • Seedlings (32%) Examples: Ponderosa pine, Colorado blue spruce, Bur oak, Catalpa • Rooted Cuttings(20%) Examples: Narrowleaf cottonwood, Plains cottonwood, Peachleaf willow • Collected Native Trees(2%) Examples: Aspen, Pinyon pine

11. Traditional nursery stock Container grown Balled & Burlapped

12. Container Trees Bud Graft #20 pots #1 pot

13. Right Tree

14. Colorado blue spruce 80’ tall by 30’ wide

15. Ponderosa pine 70’ tall by 30’wide

16. Rocky Mountain native • Largest Tree on Aspen City ROW • Narrowleaf cottonwood • Diameter at breast height = 53 inches • Condition = Good • Placement = Good • Tree Value =$30,377 60’ tall by 40’ wide

17. Tree Benefits and Value - Color

18. Hardy Ornamental Radiant crabapple 30’ tall by 25’ wide

19. Bur oak Quercusmacrocarpa 50’ tall by 40’ wide

20. New Shade Tree Princeton Elm

21. No serious pests YET Kentucky coffeetree 50’ tall by 30’ wide

22. Urban Tree Diversity Species Key:  Aspen  Black Locust  Sensation Boxelder  Narrowleaf Cottonwood  Green Ash  Japanese Tree Lilac  Mountain Ash

23. Wrong Tree

24. EAB Detroit MI – 2002 Kansas City KS – 2012 Boulder CO – 2013 Omaha NE – 2016 Sioux Falls SD - 2018

26. Know Your Soil

27. Angry Citizen Pruning

28. ContainerInspection Roots should be at container wall but not circling. Before planting make a clean cut on any circling roots to redirect their root growing path.

29. This is junk – Don’t Buy it

30. Girdling Root

31. Right Place

32. Tree Benefits • Cooling • Shaded surfaces can be as much as 20– 45° F cooler than unshaded area. • Evapotranspiration can cool an area 2 – 9° degrees as water moves through a tree • Strategically placed trees can lower cooling costs for structures • Exposed urban surfaces can be 50 – 90° hotter than the surrounding air. • Source www.epa.gov/heat-islands

36. Wrong Place

37. Look up! Look overhead to make sure you plant the right tree for the right place and right reason. If there is a wire, security light, or building nearby: • Plant elsewhere, or • Plant a small tree with a short mature height Photo by Ed Gilman, Professor, Environmental Horticulture Department, IFAS, University of Florida

38. Match Tree to the Site Right Tree – Right Place – Right Reason

42. Right Reason

43. Shade Seating Inviting Easy Maintenance Safe

44. Wind, Noise, and Visual Screen

45. Shadow Planting for EAB

47. Wrong Reason

50. Pruning Objective?