David, we use duckbills or manta rays exclusively here in the sandy loam soils
of Leelanau County because of high failure rate
With helicals in sand. I like the ductile 11" manta ray for apples and the 6"
inch aluminum or ductile for rocky soil in grapes. Whenever we have a helical
fail in an
I am in the 8th year of 3 year staggered planting growth of a Tall Spindle
Apple Orchard.
The Planted Area is about 2.5 acres containing 1750 trees.
As a first time grower in a VERY windy/blustery location, I did not want to
deal with movement or collapse.
Hence I chose 14ft long treated Yellow
George, I can't build anything straight, so I refrain from giving advice on
trellis construction!
But, we all might find this information useful:
Constructing a vineyard trellis, Paul Domoto
http://www.prairiefirewinery.com/Cellar/wp-content/uploads/2016/12/Vineyard-Trellis-Construction.pdf
This year at the Washington Hort Meetings and at the IFTA, Mark De Kleine gave
presentations on trellis building and structural integrity for support systems.
Check out this article:
David and All:
I remember someone burying 5 foot pieces of telephone poles, cross-wise,
perhaps 3-5 feet deep at the end of a row. Most of the trellises I built in
Biglerville PA survived.
I did have a Geneva Double-Curtin grape trellis fail when, after a big wind
storm flipped up one side
David,
I use these, and they work great. I have no idea how they would work in
your situation:
http://www.wilsonirr.com/ecommerce/trellis/anchoring/screw-anc-36-hvy-8-disc-hv-rod.php
You screw them into the ground using a tool that mounts on a 3 point auger
rig:
