Tree Sale Species Sneak Preview. January 26, 2016

Transcription

1 Tree Sale Species Sneak Preview January 26, 2016

2 Goals for today Sneak preview of 2016 tree sale species Plan in advance of the online go live date (Feb.8 th ) Learn tree features & benefits Endear you to qualities of the non door buster trees Gear up for spring Considerations when choosing a species and a planting location Tree planting and care tips Share what is new this year: Exclusive online ordering, a new Woodland Trio and a Conifer duo!

3 Tree Sale who has participated Who has participated? before? Who has been to the Sneak Preview before? Did you plant trees before the sale? Who has lost trees (died) purchased through sale and not sure why? Who has used the info provided on web? Every year we get good questions hope this increases your odds & success Make sure to grab a survey!

4 Tree Sale FAQ Most trees are limited in quantity City orders the summer prior to the sale Woodland Trios, Conifer duo, etc. Many sell out in the first couple days, and weeks

5 Tree Sale FAQ Trees must be planted in Minnetonka at the address listed Homeowners assn must be pre-approved by forester, contact via or phone Two trees per property, residents with multiple properties must place separate orders Only one woodland trio or conifer duo per property owner due to limited quantities No refund for trees that die, you buy this at a retail nursery

6 Online Ordering Go to eminnetonka.com There will be direct link on the home page from February 8 th -March 7th OR Public Works 7:30am-3:30pm (11522 Mtka Blvd) Cannot take CC over phone or at city hall Click link to "Order Trees" hosted by Tree Trust (will go live on February 8 th at 9:00am) Staff available to help at Public Works 7:45am-9:00am February 9 th -March 7 th 1:00pm-2:00pm February 8 th - March 7 th

7 Online Ordering Order in winter (by March 7th), pick up May 1 st and 2 nd Look at descriptions of tree species Choose tree species Make an account (different than account for eminnetonka.com) Check out and pay with PayPal or credit/debit card Will get two ed receipts shortly after order Will get mailed notification about 2 weeks before the pick up days

8 How does this build the community forest? Almost 18,000 elms & 1,000 oaks removed since 2004 Replant in advance of EAB and diversify: 12,592 trees sold + 1,000 more 2016 How many ash does your association or yard contain?

9 Ash Identification Compound leaves with 5-11 leaflets Diamond patterned bark Oar-shaped seeds Opposite branching, leaves, and buds

10 Why can t you just keep ordering more of the most popular trees? Guideline Less than 30% of any Family (ex: Fagaceae - Oaks and Beeches) Less than 20% of any Genus (ex: Quercus - Oaks) Less than 10% of any Species (ex: Bur Oak) Diversify to protect the city s forest and decrease impacts of future tree diseases and pests on individuals and the community

11 Tree Diversity - Minnetonka

12 Tree Diversity - Minnetonka Parks

13 Tree Diversity - Minnetonka ROWs

14 Managing Tree Sale Diversity Tree Sales from by Genus Genus of Tree Viburnum Ulmus Tsuga Tilia Thuja Syringa Quercus Pinus Ostrya Malus Larix Juniperus Gymnocladus Gleditsia Ginkgo Crataegus Cornus Cercis Celtis Carpinus Betula Amelanchier Acer Abies Trees sold

15 Find the right tree for the site Soil & drainage Sun availability Microclimates conditions in your yard Space and utilities Energy savings Maintenance needed Aesthetics/personal preference

16 Volume Match Tree & Soil Roots grow out not down will spread out as far as they can Root growth restricted under structures, driveways, sidewalks, and may cause damage Salt spray and salt accumulation Texture and Drainage Clay soils with poor drainage: Choose a wet-tolerant tree species. Sandy soils drain quickly and nutrients are leached: Choose a drought tolerant tree. Do not add materials (peat, sand, etc.) Wide hole U of MN Soil Test: How to Submit Samples for Analysis - Soil Testing Laboratory ph <4.8, select a tree tolerant of acidic soil >7.2, select a tree tolerant of alkaline soil (most of Minnetonka)

17 Full Sun, Partial Sun, or Shade? Diagram by Ed Gilman Full Sun: 6 or more hours direct sunlight per day. ( could be four hours in the morning, shade mid day, and four hours in the afternoon) Partial Sun or Partial Shade: A fine line differentiates the two. Partial sun means less than fun sun, 4-6 hours of sun a day. Partial shade means the amount of sun is less than partial sun, but more than shade, so ~ 2-4 hours of sun per day. Shade: Shade by definition is lack of sunlight, less than ~ two hours of sunlight a day.

18 Microclimates Photos by Ed Gilman

19 The Planting Site Look Around! Photos by Ed Gilman

20 Planting Guidelines Tree branches will be pruned to provide clearance 20 from the road surface. Dead branches or hangers will be removed when they hang over the road. The right-of-way extends at least 6 feet from the edge of the street/curb. The city may use this easement to store snow and maintain sightlines along the road way.

21 Planting Guidelines PLANTING DISTANCES TO KEEP IN MIND: *WATER & FIRE HYDRANTS: At least away (marked in blue paint) *GAS: At least 5-10 away (marked in yellow paint) STREET LIGHTS: At least away depending on size of street light. ROAD EDGE: Deciduous trees at least 15 to prevent conflict with snow storage and maintenance issues. No evergreens planted within 20 of road edge due to sightline issues, growth form and pruning challenges near the road. CORNER: Nothing over 2.5 height is allowed to obstruct views within 25 of the corner of the pavement (for sightline/safety) Refrain from planting evergreens within 20 feet of the road edge and deciduous trees within 15 feet of the road edge to plan for mature size. Refrain from planting evergreens within 20 feet of the road edge and deciduous trees within 15 feet of the road edge to plan for mature size. Maximum height of plant material in this corner is 2 ½ feet. STOP SIGNS: At least 25 away. Do not block the sign; you may offset the tree from the sign (No evergreens or small spreading trees such as crabapples, and plan for its mature size before planting near a stop sign) OVERHEAD WIRES & TRANSFORMER (ELECTRIC): There are specific criteria. (marked in red paint) Call Xcel Energy for guidelines or go to their website for diagrams: PROPERTY LINES: Be sure to give the tree room so that its MATURE canopy will be entirely on your property. Do not restrict a neighbor s free use of their yard.

22 Examples from around town Conifers in the road Water shut off valves buried in tree roots/stems

23 Match the Tree s Growth Habit to the Space

24 Examples

25 Planting for Energy Savings Deciduous trees on east and west Conifers on the north and northwest Do not plant conifers on south side Diagram and more information:

26 Maintenance to be Provided

27 Desirable Attributes Photos by Ed Gilman

28 Undesirable Attributes

29 Time Check

30 Large Shade Trees American Basswood (Frontyard Linden) Ginkgo ( Autumn Gold ) Hackberry Honeylocust (Sunburst) *New* Kentucky Coffeetree White Oak

31 Small Ornamental or Understory Woodland Trees Hawthorn (Toba) *New* Ironwood Japanese Tree Lilac

32 Woodland Trios Woodland Trio *New* What is a Woodland Trio? A mix of three #2 gallon or #5 gallon trees/shrubs It is considered one unit equivalent to one larger tree

33 Conifer Norway Spruce Duo *New*

34 A caveat on growth rates & life spans listed just a general rule of thumb Zone & growing season Soil conditions Available water Available sun Competition (trees, turf, shrubs) Cultivated variety vs. seed grown Stressors drought, construction, etc.

35 American Basswood (Frontyard Linden) Tilia americana Fall Color is yellow with some orange & brown breaking through later

36 American Basswood (Frontyard Linden) Mature Height (smaller than native) Mature Spread 40 (more narrow than native) Light Required Full Sun to Shade Canopy Shape Pyramidal to rounded Fall Color Yellow Container Size 10 gal

37 American Basswood (Frontyard Linden) Also called American linden Related to popular European cultivated variety Little leaf Linden Pollen & nectar good for pollinators, such as honeybees

38 American Basswood Species native to Minnetonka, cultivated clone Found in maple-basswood forests, lowland sites that are well drained (no standing water but can tolerate periodic flooding) Good for wetland/lake/stream edge Can also thrive in upland dry sitesfront yards SENSITIVE to road salt spray and soil salt (no busy streets) Formative prune & do not plant too Deep Growth rate medium to fast (13-24 )

39 Ginkgo Autumn Gold Ginkgo biloba

40 Ginkgo Mature Height 50 Mature Spread 30 Light Required Full Sun Canopy Shape Pyramidal, symmetrical Fall Color Yellow Container Size 10 gal

41 Ginkgo Variety: Autumn Gold Often called living fossils because the fossil records indicate it has been on earth for over 200 million years It is often planted in tough urban sites, can tolerate poor soils (salt, drought, compaction, high ph) Resistant to insect and disease attacks It is slower growing, but extremely long lived with specimens in China as old as 3,000 years old The Autumn Gold selection is male (produces no fruit) Unique branch structure Growth rate slow then medium (less than 12 per year to per year)

42 Hackberry Celtis occidentalis

43 Hackberry Mature Height Mature Spread 50 Light Required Full to Partial Sun Canopy Shape Oval Fall Color Yellow Container Size 10 gal

44 In same family as Elm and many similarities but no DED Vase-shaped mature canopy Not a showy tree, but an excellent shade tree Interesting warty bark turns scaly as ages Fruit for winter birds Robins, Cedar Waxwings generally not messy remains on tree until eaten Fruit green in summer turns maroon Sept, stays on tree until winter Hackberry

45 Hackberry Native to Minnetonka Found in lowland hardwood forests, floodplains, high tolerance to spring flooding, filling gaps from elms Good for wetland/lake/stream edge Can also thrive in upland dry sites front yard (drought resistant) Long lived up to 200 years Growth rate medium to fast ( /year)

46 Honeylocust (Sunburst) Honeylocust Pods T. Davis Sydnor, The Ohio State University, Bugwood.org Honeylocust Thorns T. Davis Sydnor, The Ohio State University, Bugwood.org Honeylocust bark Vern Wilkins, Indiana University, Bugwood.org Photo courtesy of Bailey Nurseries

47 Honeylocust (Sunburst) Gleditsia triacanthos var. inermis Suncole Mature Height 35 Mature Spread Light Required Full Sun Canopy Shape Irregularly rounded Fall Color Golden yellow Container Size 10 gal

48 Honeylocust (Sunburst) Native to far SE tip of MN Found in floodplains/moist fertile bottomlands Well developed root system allows it to thrive on upland dry sites front yard (drought resistant) and lowland/moist sites Flowers food for bees, this cultivar doesn t produce seeds so little wildlife value to deer, rabbits, etc. Average life span years Growth rate medium to fast ( /year)

49 Honeylocust (Sunburst) Cultivated clone, selected for yellow foliage Pinnately-compound, many small leaflets produce a dappled shade airy canopy Tolerant of salt in soil & spray, compacted soil, pollution Watch for spider mites & borers (Sunburst can be more susceptible to mites, so allow for predators, minimize pesticide use if possible) Honey=sweet substance in pods

50 Kentucky Coffeetree Gymnocladus dioica

51 Kentucky Coffeetree Mature Height Mature Spread Light Required Full Sun Canopy Shape Open, Spreading Fall Color Yellow Container Size 10 gal Last tree to leaf out in spring and first tree to drop leaves in fall

52 Kentucky Coffeetree Awkward and slow growing until established ~5 years Will look like a stick at first Plant to compliment other trees Most related living relativehoneylocust Delicate leaves create dappled shade November Oakland Rd Trail

53 Kentucky Coffeetree Native to parts of southern MN Uncommon/rare where it occurs Most often terraces of MN & Miss. Rivers Upland moist /dry sites front yard (drought resistant) Is either male or female No animal in range known to eat pods or disperse seeds within ~ theory animal evolved to disperse extinct near Pleistocene 13,000 yrs ago (no real wildlife benefit, no browsing) Shallow platy fissures in bark Can reproduce/spread by suckering stems from roots (clone) Growth rate slow (less than 12 ) until established, then medium (12-24 )

54 White Oak Quercus alba

55 White Oak Mature Height Mature Spread Light Required Full Sun Canopy Shape Irregularly rounded & spreading Fall Color Purple-red (some variation) Container size 10 gal

56 White Oak Native to Minnetonka Purported to have a slightly faster growth rate than bur oak (still slow-medium ) Among longest-lived oaks, on excellent sites Best wildlife tree (tie with bur oak) White oak woodland Vern Wilkins, Indiana University, Bugwood.org

57 White Oak Sensitive to flooding Prefers a moist well drained soil, keep mulched in a yard setting Drought resistant once established Good tree for wooded edge or opening Cannot survive prolonged shade

58 5 minute break When we continue: Small Ornamental or Understory trees Woodland Trio Conifer Duo Planting and Care Questions

59 Hawthorn (Toba) Crataegus x modensis Toba

60 Hawthorn (Toba) Mature Height Mature Spread 12 Light Required Full Sun to Partial Sun Canopy Shape Upright, Rounded Fall Color Insignificant Container Size 10 gal

61 Hawthorn (Toba) Introduced by Morden Research Station of Manitoba, Canada and very hardy Fragrant large double white flowers turn pink, timing is mid-spring Bears 1/2 red fruit in early/late fall Twisted trunk provides winter interest, only 4 clearance Grows in a wide range of soil types dry & moist but does not like standing water Avoid overhead watering with sprinkler Does have thorns 1-3 long best as a feature in a low-use area without small kiddos Lifespan is about 40 years old Growth rate medium (12-24 per year)

62 Ironwood Ostrya virginiana

63 Ironwood Mature Height Mature Spread 25 Light Required Full Sun to Shade Canopy Shape Pyramidal Fall Color Golden yellow Container Size 10 gal

64 Ironwood Native to Minnesota Also known as Hophornbeam Retains its leaves after autumn Unique hop like fruit offers winter interest Excellent replacement for buckthorn in woods Provides a limited amount of food for wildlife Grows in a wide range of soil types Can reproduce through stump sprout Relatively free of pests and diseases Very tough wood Tough resilient branches resistant to wind, snow, and ice damage Makes good fuel wood and handles for tools Growth rate slow (less than 12 per year)

65 Japanese Tree Lilac Syringa reticulata

66 Japanese Tree Lilac Mature Height 25 Mature Spread 15 Light Required Full Sun Canopy Shape Oval, compact Fall Color Insignificant Flowers White July Container Size 10 gal

67 Japanese Tree Lilac Single stem not a clump Not native, but well-adapted to MN Able to tolerate some of the worst soils (salty, dry, compact) Large crème-colored flowers in July Glossy golden bark Plant in full sun for best flower development Medium growth rate (13-24 /year) Lifespan years depending on site conditions

68 Woodland Trio Will include 1 of each of the following: 1 #5 Purpleleaf American hazelnut (grown from seed) 1 #2 Gray dogwood 1 #5 Nannyberry Container size 2 or 5 gal Perfect for buckthorn replacement in naturalized plantings or woodland edges Plant in canopy openings providing sun, or on a woodland edge Need sun for best flower and fruit development You must protect young plants with welded wire caging

69 Bailey Select Purpleleaf American hazelnut Woodland Trio Nannyberry Gray dogwood

70 Woodland Trio Tidbits Purpleleaf American Hazelnut (Corylus americana Purpleleaf Bailey Select ) Mature height: 6-8 and Spread: 6-8 Rounded form Burgundy fall color Edible nuts, clusters of 2-4 Grown from seed Gray dogwood (Cornus racemosa) Mature height: 6-8 and Spread: 5-6 Purple fall color White berries MN seed source Nannyberry (Viburnum lentago) Mature height: 20 and Spread: 6-10 Upright vase-shaped Purple-red fall color White flowers in May (smell amazing) Purple berries for birds Photo courtesy of Prairie Restorations

71 Norway Spruce Duos Picea abies Photos taken in Minnetonka and near Red Wing, MN

72 Norway Spruce Mature Height Mature Spread Light Required Full Sun Canopy Shape Pyramidal Fall Color Green Container Size #5 Photo taken at Villa Maria near Red Wing, MN

73 Norway Spruce Duos Includes two 2 trees European species but very hardy and disease resistant Cones 4-6 Moist sandy or loamy soil best but well drained clay OK Fastest growing spruce Photo taken at Villa Maria near Red Wing, MN

74 Trees For Shade Shade American Basswood Ironwood Partial Shade American Basswood Hackberry White oak Hawthorn Woodland Trio

75 Flowering Trees (showy) Hawthorn Japanese lilac Woodland Trio

76 Trees for wetland/pond/creek edge Hackberry lowland hardwood forest, moist site not standing water Honeylocust American Basswood lowland hardwood forest, moist site not standing water

77 Fabulous Fall Color Ginkgo (yellow) Honeylocust (yellow) Kentucky coffeetree (yellow) White oak (red-purple) Woodland trio Ironwood (golden yellow)

78 Trees to improve your backyard (upland) woodland post buckthorn Over story Canopy Layer: Hackberry American Basswood White oak Understory Sub-Canopy Layer (where buckthorn usually lives) Ironwood Woodland trio

79 Trees to improve your backyard (lowland) woodland ~ usually filled with boxelder, cottonwood, elm, and Hackberry ash Associated w/ elms, ash, start of upland sites American Basswood Honeylocust

80 Hackberry Trees for Tough Sites Poor drainage, compacted, droughty Kentucky Coffeetree (no insects/disease) Droughty, compacted, some salt Ginkgo (no insects/disease) Salt tolerant, droughty compacted soil, high ph Hawthorn Japanese tree lilac Norway spruce

81 Bird Magnets/Wildlife Food Hackberry (fruit) White oak (acorns & caterpillars) American Basswood (pollen and nectar) Ironwood (fruit) Woodland trio (fruit, flowers)

82 Time check

83 Selecting a Nursery Tree Vigorous tree - good twig extension and healthy leaves Look for good branch spacing and trunk taper Even foliage distribution through upper 2/3 Strong central leader Branches should be spreading, not upright Avoid mechanical damage, especially on trunk Inspect tree for disease or pests Examine root ball and avoid circling, dried, or discolored roots

84 Tree Selection & Planting Decide on tree species, then ensure you are a savvy tree-consumer Natural resources division staff check trees coming from nursery- we help you with selection by selecting only the best! Some light pruning may be done if time permits You are 100% in charge of planting (Owen s tree)

85 Containerized Trees Pros Easy to transport Relatively inexpensive Can be planted any time of year Smaller trees establish faster Rule of thumb: 1 year transplant shock for each inch in caliper, so a 1 tree= 1 year of root growth before you can expect to see any branch elongation/stem growth Cons May be more susceptible to circling roots if container grown Root system only as big as the container

86 Living your life in a container is not normal

87 Well, I m not planting the tree, someone else is Don t assume it is getting done right because you hired a professional company Sometimes the right training and information doesn t trickle down If you are an educated consumer, you will know what to look for from now on!

88 Planting the Tree 1. Safety First underground utilities and obstructions need to be located 2. Pay attention to the roots! Locate top root and treat any root defects with container trees best to do the box cut 3. Dig the hole wide and shallow based on the box-cut root ball s height and width 4. Position the tree in the hole and remove synthetic materials 5. Backfill the planting hole (same soil) 6. Water as you back fill 7. Add mulch (no fertilizer) 8. IF NECESSARY, stake and prune dead or damaged branches

89 Gopher State One Call Underground utilities should ALWAYS be marked before planting. Contact Gopher State One Call at or at least 2 business days before you plan to dig.

90 Locate Top Root

91 Correct Root Defects

92

93 Left on their own, circling roots can cause problems like this...

94 Planting the Tree, Cont.

95 Only You Can Prevent Stem Girdling Roots (SGRs)

96 Measure the distance from the top root to the bottom of the root ball. Dig hole 90-95% of that distance; it is fine for 5-10% of the root ball to be above the landscape grade. Do NOT add soft fill to the bottom of the hole; settling will occur after the tree is placed in the hole. The hole should be 2-3 times as wide as the root ball. Taper the sides of the hole; most vigorous root growth occurs at the surface.

97 Planting Photos by Ed Gilman

98 Planting Handle tree by the root ball or container, not the trunk! Remove plastic and/or fabric from ball Photos by Ed Gilman

99 Top root is at grade; take care not to plant too deep. Soil is loose, but moderately packed. Photos by Ed Gilman

100 Water the tree - add soil if necessary, but do not over-pack, which can cause too much compaction.

101 Care After Planting Proper watering is key Rule of thumb is 1 of rainfall OR supplemental water per week plan to watch closely for at least 3 years Slow, gentle soaking of root zone Monitor moisture level of root ball as well as surrounding soil Do not allow excess water to accumulate in the planting hole Adjust watering practices for the soil type and drainage (what does this mean?)

102 Gator Bags Soaker hoses Rain barrels dedicated Hose on lowflow Timer hooked up to soakers NO SPRINKLERS Watering Helpers

103 Mulch Do apply mulch under tree 2-4 of mulch Do NOT mound against trunk Reduces competition from weeds and grasses Conserves soil moisture Do not line mulch bed with plastic Gently turn/rake mulch each spring to remove crust that forms making it sometimes repel water Reapply every couple years- this is a good thing! It means your soil is being improved as the mulch breaks down

104 Mulch

105 Mulch When planting on a slope: be sure to create a soil and mulch berm on the downward side to help contain the water close to the tree root system

106 Turf competes with tree roots, limiting its access to water and nutrients. NO! Volcano- Mulching traps moisture against the trunk and doesn t allow water and air to reach the roots trapped beneath the mound.

107 Staking: Should I or Shouldn t I? Don t stake if you don t need to; staked trees tend to Have a smaller caliper trunk Have less trunk taper Have a less developed root system Be prone to breakage when stakes are removed

108 Staking: Should I or Shouldn t I? Staking may be necessary if The tree was grown in loose soil It is a large tree It is a windy site It is an oak (rubbery) Staking may be recommended to BAD! Reduce movement of the root ball Protect against vandalism and mechanical damage

109 Single Stake Place on upwind side of tree (spring/summer winds) Do not allow stake to be placed where it may damage the root system (outer edge of root ball is ideal) This is most common type needed with tree sale trees Above and to right- not ideal staking!

110 Double or Triple Staking Equal spacing around tree Use as few stakes as possible Use broad, smooth, flexible material to attach stakes to tree Photos/diagrams by Ed Gilman

111 Stake Properly & Remove Promptly Photos by Ed Gilman

112 Care After Planting, Cont.

113 Transplant Shock Due to loss of roots, trees access to water and nutrients is limited Some is normal Signs of shock include: Leaf scorch Leaf drop Stunted growth

114 Care After Planting Limit pruning until tree is established Do NOT prune to compensate for root loss Until established, remove only diseased, damaged, or broken limbs Once established, it is desirable to begin a structural pruning program to encourage proper branch structure and form

115 Care After Planting Use tree wrap with extreme caution Commonly used to protect against temperature fluctuations, sunscald, and insects Reality is wrap may amplify temperature fluctuations, and retains moisture which can attract insects and promote fungal problems If used, prompt removal is essential

116 Care After Planting Tree guards may be used to protect young trunks from mechanical damage. If used, must be loose fitting and allow air circulation.

117 More Tree protection ideas

118 Just say no to Rocks and edging Black plastic placed to restrict weed growth girdled the stem of this tree and killed it

119 Questions? Emily Ball City Forester ISA Certified Arborist # MN-4284A eball@eminnetonka.com