Funding Provided By Arizona State Forestry Division. TreeConnections

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1 Funding Provided By Arizona State Forestry Division TreeConnections

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5 Benefit of Trees Social benefits Communal benefits Environmental benefits Economic benefits

6 Trees for Tucson gardens Why plant trees??? Adds value to home property More comfortable outdoor environment Energy savings by shading the house Privacy and more comfort inside More attractive property Increasing value as trees mature

7 Increased home value; about 15% with attractive landscaping

8 Guidelines for energy conservation Learn the path of the sun throughout the year Sunlight in the summer warms the east and west walls of homes Sunlight in the winter warms the south walls Use evergreen and deciduous trees correctly Use evergreen trees to block cold winds northwest and north side Use deciduous trees to allow sun to warm the house in the winter Use deciduous trees to shade the house during the hot months

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13 Tree Selection and Care Where to plant and not to plant trees Appropriate trees for the garden size How to plant How to care for trees Water issues

14 Where to plant trees Place trees where they make outdoor living more comfortable For Privacy For Screening unattractive views Noise reduction Proper placement for energy savings and comfort

15 Where not to plant Never plant too close to structures or walls Do not plant trees too close to each other Avoid having messy trees overhanging patios and driveways Do not plant to close to sidewalks

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18 Acacia farnesiana A.smallii - Sweet Acacia 15 x 20

19 Appropriate trees for your garden Large trees or small trees? Evergreen or deciduous trees? Canopy for shade or for privacy? Fast growing or slow growing?

20 Large or Small Trees First decide what type of tree you need Trees that are too large for their site will need extra pruning Large trees are usually more work Most important: Fit the tree to your property size

21 Parkinsonia floridum Blue Palo Verde 35 x 30

22 Bauhinia lunaroides Orchid tree 15 x 12

23 Evergreen or deciduous trees? All trees loose their leaves, deciduous trees leaves fall all at one time Evergreen trees good for north-west and north side of home Deciduous trees good for east and south side Evergreen trees good as permanent privacy screen

24 Quercus - oak 50 X 30 or more

25 Lysiloma watsonii - Feather tree 15 x 15

26 Canopy shape of trees Some trees have broad canopies, good for shade trees: Mesquites, Palo Verde, Vitex, Sweet Acacia Tall, narrow canopies, good for privacy, ornamental value, shading west side: Acacia salicina, Desert willow, Oaks, Texas ebony

27 Prosopis velutina - Honey mesquite x 15-30

28 Acacia salicina Willow acacia x 15

29 Fast or Slow Growing Trees Palo Verde, Mesquite, Sweet Acacia, and Desert Willow are some of the fastest growing trees Slow growing trees include Oaks, Ironwood, Olive trees,

30 Acacia smallii - Sweet acacia 25 x 15

31 Olea europaea Swan Hill Olive Swan Hill

32 How to plant trees in the desert Southwest

33 Staking young trees

34 Caring for Trees Fertilize Use granular fertilizer, fertilize at the drip line Plants in the Legume family - no need to fertilize Pruning Do not prune new plants for 2 years Prune mature trees as needed Never prune more than 20% off trees Inspect trees annually Bring in professional for major jobs Check their work before hiring them

35 How to water Water the root zone 11/2 to 3 times as wide as the canopy Water 2 to 3 feet deep depending on the size of the tree Young plans watered more often than mature plants Water when the top 1/3 to 1/2 of the root zone is dry Plants with deep well developed roots need water less frequently

36 Water Use in Plants Important for everyone in Tucson and Arizona Limited water available to all of us in the future Water becoming more expensive Many of our trees are drought tolerant Native trees, as a rule, use less water Always use a drip irrigation system, water saving can be as much as 50%

37 Drought tolerance & Drought resistance Most drought tolerant trees have special adaptations to dry and hot climate such as small leaves, leaves that have a thick and leathery coating, grayish-green color and thick bark. All plants need to have additional water for the first two years after they are planted. Then gradually cut back on the water. Only plants that are classified as drought tolerant or drought resistant can survive on natural rainfall. Most trees will need additional water when we have a prolonged drought.

38 Signs of over-watering Soil is constantly damp Leaves turn a lighter shade of green or turn yellow Young shoots are wilted Leaves are green yet brittle Algae and mushrooms are growing Signs of under-watering Soil is dry Older leaves turn yellow or brown, and drop off Leaves are wilted Leaves curl

39 Water Harvesting Way to cut down on water bills: Create berms and swales in the landscape Capture the water that comes off the roof Create basins around trees to capture water Create terraces to slow down on drainage Mulch all the plants with 3-4 inches of mulch

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41 More plants die from over watering than under watering. Established trees will not need to be watered more than once a month. Water to a depth of 36 for established trees Stress symptoms: Smaller leaves, green leaf color off Use a soaker hose at the drip line for extra watering for stressed trees

42 Purchasing trees Always check trees before purchase, check for good pruning, no girdled roots, bark without chips and nicks. Check for good pruning. The leader of the tree should not be pruned. Avoid trees that are susceptible to Texas Root Rot. Native trees are not susceptible. (Cooperative Extension leaflet; Diseases of Landscape trees)

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44 Planting considerations October is the best planting month 1. Don t always buy the biggest size plant. 2. After digging a hole for the plant, fill it 1/3 with water - drain 3. Never dig a hole that is deeper than the height of the root ball. 4. Do not amend the soil. 5. Always remove the nursery stake. 6. Water every day for 10 days, then slow down. 7. Do not prune the plant for the first 2 years.

45 Trees for Tucson

46 Olneya tecota Ironwood x 20-25

47 Acacia schaffneri - Twisted acacia x 25

48 Acacia schaffneri - Twisted acacia

49 Ebenopsis ebano Texas ebony x x15

50 Ebenopsis ebano Texas Ebony x 15

51 Parkinsonia Desert Museum Palo verde Desert Museum Size 20 x 30

52 Parkinsonia microphylla Foothill palo verde x 10-20

53 Acacia berlandieri Berlander acacia 15 x 15

54 Chilopsis linearis --Desert Willow x 15

55 Chiliopsis lineraris Desert Willow x 15

56 Prosopis velutina Honey mesquite x 15-30

57 Cercis canadensis var. mexicana Mexican redbud x12

58 Cordia boissieri Texas olive x 12

59 Lagerstromia indica Crape myrtle 20 x 15

60 Parkinsonia praecox - Palo Brea x 15-30

61 Prosopis glandulosa --Texas Honey Mesquite 25 x 35

62 Vitex agnus-castus Chaste berry x 25

63 Acacia aneura Mulga tree x 10-14

64 Eysenhardia orthocarpa Kidneywood 18 x 15

65 Pistacia lentiscus Mastic tree x 15-20

66 Pistacia chinensis - Chinese pistache 30 x 50

67 Problem trees in Tucson Parkinsonia aculeta - Mexican palo verde Tamarisk aphylla - Tamarisk Rhus lancea - African sumac Ailanthus altissima - Tree of Heaven Melia azedarach - Chinaberry tree All pine trees (Australian, Eldarica, Canary Island, Aleppo) will grow to 40 50

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69 Funding Provided By Arizona State Forestry Division TreeConnections