Earth Anchor / Auger (Straight / Spiral)

Earth Anchors are spiral or straight-blade ground anchors that screw into soil to capture the cumulative tension from trellis wires at the end post and transfer it into earth resistance. In loamy and clay soils, choose spiral anchors, where rotational penetration works effectively. In sandy soils, choose straight-blade anchors, where the flat bearing surface maximizes ground contact. Either way, the anchor holds your end post stable against row tension, so the entire trellis geometry stays true. Tell us your soil type and row tension and we'll match the anchor to your site.

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At a glance

Earth Anchor / Auger (Straight / Spiral) at a glance.

Definition

End-post load transfer to ground

Spiral or straight-blade anchors that screw into soil to hold your end posts in place, converting horizontal wire tension into downward soil resistance.

Soil fit

Anchor type matched to soil condition

Spiral anchors suit loamy and clay soils, where rotational penetration is effective. Straight-blade anchors suit sandy soils, where the flat bearing surface maximizes ground purchase.

Product form

Steel rod with helix or blade

Steel rods ½ to 1 inch in diameter, with a 4 to 10 inch helix diameter and 8-gauge-and-up helix thickness; 12 inches and longer; painted, powder-coated, or hot-dip galvanized finish.

Also known as

Earth anchors and augers for vineyard and orchard rows are also sold as ground anchors and screw anchors, amarres in France, Erdanker or Schraubanker in German-speaking markets, ancora ad elica in Italy and anclaje de hélice in Spanish.

English: earth anchorground anchor
United States: screw anchoraugerhelical anchor
Français: amarres
Deutsch: DrehankerErdankerSchraubanker
Italiano: ancora ad elica
Español: anclajeanclaje de hélice

Trade names for the whole range

How it works

Screwed into soil at an angle, anchor converts wire tension to ground resistance

Install the anchor away from the end post at an angle into the soil. Attach a cable or tie-rod from the anchor to the post. As trellis wires load the post horizontally, the anchor's ground penetration and blade geometry convert that horizontal pull into downward soil resistance, pinning your post in place against cumulative row tension.

Common applications

Where it is used.

Application

End-post bracing in vertical shoot position systems

Anchors your end posts in VSP and single-wire systems, where wire tension must transfer safely to ground resistance.

Application

High-tension systems (T-trellis, multi-wire configurations)

Provides load transfer in systems carrying multiple wires per post — table grapes, kiwifruit — where cumulative tension runs high and post movement risks structural failure.

Application

Soft-soil and high-water-table vineyard sites

Anchors your end posts in alluvial, sandy, or moisture-saturated soils, where anchor purchase and long-term holding capacity matter most.

What are earth anchors called in different languages?

Earth anchors for vineyard and orchard rows are called ground anchors in English, screw anchors in the US, amarres in France, Erdanker or Schraubanker in German, and anclaje de hélice in Spanish. They resist wire tension.

How do earth anchors work in vineyard and orchard systems?

Earth anchors for vineyard and orchard rows screw into the ground behind end posts to resist the pull of tensioned wires. Augers are available with straight or spiral blade designs for different soil types and conditions.

Vineyard & Orchard Systems

End-post load transfer to ground

Earth Anchors show up in end-post bracing across every vineyard and orchard trellis system. Your soil conditions and system tension load determine which anchor type — spiral or straight — and installation method will hold best on your site.

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Earth Anchor / Auger specifications