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Posts, Stakes &
Trellising |
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Ask about our "Quantity Pricing" opportunities
for saving you $$$ |
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OVS sells a
full line of posts for trellis and
fencing projects. For farmers
desiring organic certification in an
orchard or a vineyard, steel is the best
option. The wood posts stocked by
OVS do not meet organic standards, as
they are treated with preservative
(however, organic certification may be
possible if applied for in future years;
checking with your certifier is
recommended).
Winegrape trellis systems will cost
approximately $2,400 per acre for
wood or $2,800 per acre for metal.
The diagram below shows some of the
post options that might be used
in a vertical shoot position trellis
design.
It is
not a design for a trellis system,
nor is it to scale.
The wood posts
stocked by OVS are manufactured by
Princeton Wood Preservers. The steel
posts sourced by OVS are American
made. As seen
above, standard trellis line posts
can either be T-Posts, Bent Edge
posts or Double Diamond posts. A
metal end post option would be the
Rib-back.
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Wood posts
Quality Does
Matter!
Click to see
the difference
OVS
carries the Princeton Wood Preserver
pine posts. PWP posts undergo a
special treatment
 process that
extends the service life of wood.
Some post manufacturers use brush
coatings that provide superficial
protection for one to three years,
and there are dip
treatments that give slightly more
protection. However, at PWP, the
posts are kiln dried to remove
natural moisture prior to receiving
a full-length pressure treatment
using a water-borne wood
preservative chemical formulation
called Chromated Copper Arsenate.
This provides the wood product with
a useful life expectancy of about 30
years.
OVS stocks standard 6’, 7’, 8’, 9’
and 10’ lengths in diameters of
3-4”, 4-5” and 5-6”. Other sizes are
available with prior notice orders.
PWP posts are available with either
pointed or blunt ends. PWP posts are
commonly used in grape and blueberry
trellis systems (see diagrams).
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Steel Posts
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OVS stocks
the Rib-back post as an
end post option. This
9’ post has 3# of steel per
foot. It is ideally suited
for rocky or hardpan soil
conditions. The 3/8”
diameter holes run the
entire rib length of the
stake every 2”. Spades are
available upon request for
field installation.
OVS stocks three types of
metal line posts.
Standard t-posts are
available both painted and
unpainted, in heavyweight
(1.25# of steel per foot)
and extra heavy weight
(1.33# of steel per foot).
Notched line posts
stocked by OVS include both
the Double Diamond and the
Bent Edge post.
The Bent Edge post
can handle a "snap-in" cross
arm. These economical cross
arms range in length from 6'
to 12'. Standard stock includes
non-galvanized, 8’, 13 gauge
posts, although other
lengths, gauges or
galvanization are available
upon special order.
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Sample Grape Trellis Design,
Vertical Shoot Position
In
the Willamette Valley of Oregon, the
most common winegrape trellis design
is the vertical shoot position
system. However, OVS also
sells supplies for other trellis
systems: Scott Henry, the Open Lyre,
or a cordon system. These systems
can be seen in a book available at
OVS:
The Oregon Winegrape Growers Guide
(call to order a copy).
Seen below is the OVS
recommended option for vertical
shoot position trellis system for
wine grapes:
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Sample Blueberry Trellis
An OVS recommended
trellis system for a blueberry
trellis is shown below. Research
at Oregon State University has shown
that blueberry trellising can reduce
machine harvest losses by 3 to 8%.
As growers push blueberries to
produce longer canes of new wood,
subsequent heavy fruit loads can bow
these canes to the ground. Also,
some blueberry varieties prefer to
grow bushy rather than upright.
Trellising squeezes the limbs into a
more vertical habit, ensuring that
the premium fruit produced on new
wood gets harvested rather than
dropped. In many blueberry
fields trellising can pay for itself
in a year or two and provide service
for the life of the planting.
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Related areas of Interest |
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