-right tools for the job? -do you know your tree or shrub species? -what is your goal in pruning?...
TRANSCRIPT
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-Right tools for the job?-Do you know your tree or shrub Species?-What is your goal in pruning?-Are you capable of accomplishing it safely or should you call in an Arborist?By: Natalie Randall, ISA certified arborist.
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Northwest Poplar in city park
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My backgroundI have had my own tree company, Natural
Choice Tree Services, for 3 years here in Regina. Which is when my family moved here from Alberta.
Journeyman Landscape Gardener, from Olds College in Olds Alberta.
ISA certified arborist. been in the industry since 1997.
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Background cont’dWorked for 2 tree pruning companies in
Calgary, A garden centre in the tree lot, The City of Calgary as an Urban Forestry Gardener, A lawn maintenance company and a landscaping company putting in city parks.
Worked as an estimator, tree climber, bucket truck operator, crew foreman, and diagnosed insect and diseases of trees and shrubs.
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Me, many moons ago In Arborist Supply Co. Catalogue.
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Right tools for the jobTools have to be sharp and they have to
clean.To make clean cuts with no tears in bark. To be disinfected which keeps disease transfer
from happening.
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Pruning ToolsHow big are the cuts that you will be
doing?Hand pruners, (by-pass)Secateurs for anything
3/4 inch or smallerTri-edged, curved hand saws or folding saws
for anything largerLoppers for bushes, cuts too large for secateursShears for shaping of bushesPole pruners for higher cuts not able to be
reached from the ground Wood or fibreglass
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Safety firstUse proper safety equipment (PPE)CSA approved safety glassesGloves, leather is good.
Thorns- rose bushes, Russian Olives, Hawthorns,
Sap-Spruce and other conifersComfortable shoes, no open toe garden shoesLong pantsEar protection, if necessary
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Overall plant healthSoil Compaction? Soil pH? Surrounding
plants?What are the drainage issues?
Does the plant sit in water every spring? Corners of back yard. Put in higher beds or add
weeping tile? Does it get enough water?
Mature Spruce-Run your hand down branches, do needles freely fall off? Mayday
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LandscapingHas the area been re-landscaped around
the plant? Has the plant been planted at the right level,
not too low or too high. Do not pile chips against trunks, leave a space.
Is there evidence of trunk damage by lawnmowers or other mechanical devices or rabbits? A tree space- not a tree well.
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ID your plantWhat kind of plant is it?
Coniferous or deciduous? Does it lose its leaves in the fall? Larch-deciduous/conifer.
Opposite or alternate buds? Simple or compound leaves? Lilac in front
of Spruce
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Time to pruneWhat time of year can it be pruned?
Birch- Maple, in full leaf because of sap that exudes and can attract more insects and diseases.
Elm- A city bylaw so only in dormant season because of concerns of Dutch Elm Disease transmission.
Most trees and shrubs can be pruned at any time unless there are disease concerns.
American Elm street trees
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Insects and DiseasesWhat type of insects and diseases is the
species prone to and are evident? Pear slug on Rosaceae family, cotoneaster etc. If evidence of aphids or other sucking or
chewing insects. Pear Slug Forest Tent Caterpillar
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Where can you find help?Know the resources available.
Of course, call a reputable arborist. We know our species, insects and diseases and how to treat them as well as how to prune properly and safely. America’s Funniest Home Videos
Go to your Garden centre with a sample or a picture.
Look at City of Regina website. They list common pests and diseases.
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Plant conditionsWhat are the growing conditions that the
plant thrives on? Wet feet-Birch and willow Shade-like Dogwood and Cranberry
What would you like pruned? Limbs off over fence, light shaping, dead wood
etc...
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Right locationIs the plant in the right location? Do the roots have enough room, at least
twice the size of the canopy?Is it able to grow unimpeded to its mature
height and spread?In our urban landscapes, probably not.Can you prune it to fit the space or do you have
to consider removal?
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Ethical and moral standardsNo topping of trees unless shaping fruit trees
or coniferous trees.Topping causes sprouts where one branch
grew now several badly attached branches grow, huge shock to tree, unsightly, safety hazard. Pollarding is a pruning practice in Europe which is
very costly and time consuming where you cut growth to knuckles that form. It is not widely used here we have different species.
Espalier is training fruit trees to grow along walls, time consuming as well.
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Rules of Pruning:Only prune 1/4 to 1/3 of live growth out of a tree
or shrub in any one season.(unless rejuvenating shrubs)
Pruning:1.Prune deadwood and diseased first. 2. Then prune crossing and rubbing branches. 3. Thin out.4. Lastly, prune for shape.
If the tree in question needs a lot of work then prune in alternate seasons so it is not a huge shock to the tree.
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Bark damage And Black knot on Mayday
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Put everything together
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Basic pruning of shrubsPractice on shrubs, they are more forgiving.Pruning shrubs, remove ¼ - 1/3 live growth
every year. To just above the ground.
Leave younger more vital stems. That is how they grow. Prune plants just after flowering before new buds
develop if you like flowers. Lilacs.If shaping you can trim with shears without a lot
of detrimental effects. I make larger cuts with proper 30 degree angles.
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Training of bushes to tree form
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Heading-back cutsWhen heading back a branch, twig or bud has
to be 1/3 the size of the cut branch. Which means you can not cut a large limb
back to a bud or twig because it will not compartmentalize over the wound.
The wound will not seal and insects and diseases will enter the tree.
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Tree physiologyTrees seal they don’t heal.Callus tissue forms and makes donuts over
wounds.Leaving stubs or cutting into callus tissue
causes decay in trees.
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Pruning cutsPut pruning tool with blade in crotch at a 30
degree angle from the top, just outside the callus tissue.
Every bud, twig, branch and stem has a bark collar that is about a 30 degree angle perpendicular to the trunk or branch it grows out of.
Angle your tool of choice depending on the size of the limb in question and make a clean cut.When nearing the end of the cut slow down and hold
the branch in question to lessen possible tearing.
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Proper angle of cut to bud.
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Pruning larger limbsThe Jump Cut Method- make an undercut on
the branch approx. 10 inches from the trunk in question to 1/4-1/3 the width of the branch.
Then go out 4-6 inches from there and cut the branch through from the top. Hold on to branch you are cutting if possible.
Now you are left with a stub, angle your tool outside of the branch collar and make the final cut.
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Jump Cut for larger limbs
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When to call an ArboristOnly do cuts and pruning within your
capabilities.You need to have enough time to do the job
right.Any cuts higher than your pole pruner, or too
large should be done from within the tree with a saddle and a lanyard or rope.
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Things to rememberPractice makes perfect, shrubs are forgiving. ID your species to know when to prune.Use the right tools for the job.Use proper safety gear.Know your limits.Use a licensed arborist, look for credentials.
Words like hacking and topping should not be used to describe pruning.
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In conclusionTrees and shrubs are a valuable asset to the
urban environment and well maintained landscapes:Increase property valueIncrease aesthetic appeal and create an urban
oasis.Increase oxygen levels in the environment.Create a warmer microclimate.Provide shade in the summer.
Thank-you White City for inviting me to speak!
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Happy Pruning