Scott Henry System

The Scott Henry system is a cane-pruned, vertically divided canopy training method in which shoots from upper canes are directed upward while shoots from lower canes are trained downward toward the ground. This creates two distinct fruiting tiers on a single row, effectively doubling the canopy surface compared to a standard Vertical Shoot Positioning setup. It was invented in 1982 by Calvin Scott Henry III, a former aeronautical engineer who had planted 12 acres of vineyard on his family homestead in Oregon's Umpqua Valley near Roseburg in 1972 and opened Henry Estate Winery in 1978. Frustrated by rot-prone grapes produced by vigorous, rain-soaked soils, Henry applied his engineering background to split the canopy and expose fruit to more air and sunlight.

• Developed in 1982 at Henry Estate Winery in the Umpqua Valley, southern Oregon, not the Willamette Valley
• Uses cane pruning with two fruiting wires at different heights; cane pruning makes canopy separation easier than spur-pruned alternatives like the Smart-Dyson
• One of several divided-canopy systems alongside the Geneva Double Curtain and Smart-Dyson, though Scott Henry divides canopies vertically rather than horizontally

On high-vigor, cool, or wet vineyard sites, excessive vegetative growth shades fruit and creates the humid microclimate that favors powdery mildew and botrytis. Standard VSP struggles to solve this because it offers a single fruiting tier with limited surface area. The Scott Henry system addresses these problems architecturally by doubling canopy space, allowing more shoots per vine without increasing shading. Research and widespread grower experience confirm that it delivers higher yields, earlier ripening, less bunch rot, and better fruit composition. With climate change pushing warmer growing seasons, some Oregon growers are exploring Scott Henry as a tool to delay sugar accumulation and preserve acidity in Pinot Noir.

• Doubles the number of shoots per linear foot of row compared to VSP, channeling vine energy into productive fruit rather than dense, shaded foliage
• Improves air circulation and light penetration, reducing bunch rot and disease pressure without increasing chemical inputs
• Trials in New Zealand documented consistently higher yields of 30 percent or more over VSP, with typically earlier ripening and better fruit composition

The system typically uses four canes at pruning: two tied to an upper fruiting wire at roughly 46 inches and two to a lower fruiting wire at roughly 40 inches. Shoots from the upper canes grow upward in the normal phototropic direction, while shoots from the lower canes must be redirected downward, against their natural tendency, around the time of flowering. A single movable foliage wire below the head assists in holding the lower shoots downward once they are positioned. Timing is critical; shoots turned too early risk breakage, while those turned too late will have already attached by tendrils to the upper wires. Converting an existing VSP trellis requires adding only one extra wire per row, making infrastructure cost modest.

• Four canes at pruning: two on the upper wire at approximately 46 inches, two on the lower wire at approximately 40 inches, on opposite sides of the post
• Shoot positioning of lower canes takes place around two weeks before flowering; a movable foliage wire holds shoots downward after separation from the upper tier
• Conversion from VSP to Scott Henry requires adding only one wire per row, keeping infrastructure investment low compared to horizontally divided systems

The system has spread well beyond its Oregon origins. In Oregon, it is used on vigorous valley-floor sites, including Pinot Noir blocks in the Willamette Valley where fertile, water-retentive soils create excessive canopy growth. In New Zealand, viticulture consultant Richard Smart, who first met Scott Henry in Oregon in 1983, became an influential advocate; Delegat Wine Company (the producer behind Oyster Bay) took up the system and developed what has been reported as the largest concentration of Scott Henry-trained vines in the world, spanning Marlborough, Hawke's Bay, and the Barossa Valley of Australia. The system is also applied in the Finger Lakes of New York and in cool-climate hybrid-grape regions of the Midwest, such as Wisconsin and Michigan.

• Adopted widely in New Zealand's Marlborough region; Delegat Wine Company reportedly has the largest area of Scott Henry-trained vines in the world across New Zealand and Australia
• Used in the Finger Lakes of New York for Riesling and other varieties on vigorous sites where canopy management is a seasonal challenge
• University of Wisconsin-Madison trials confirmed strong performance with cold-climate hybrid varieties, expanding relevance beyond vinifera

The key advantage of Scott Henry is the combination of higher yields, better fruit quality, and reduced disease pressure, all achievable with modest infrastructure cost when converting from VSP. A University of Wisconsin-Madison trial found 50 percent more yield than VSP with no reduction in quality metrics, and Richard Smart's New Zealand trials documented 30 percent or more yield increases alongside earlier ripening and less bunch rot. Labor is moderately higher than VSP, with estimates of around 25 percent more shoot-positioning time per acre. The main operational risk is mistiming the downward shoot positioning: too early causes shoot breakage, too late means tendrils have already fixed the shoots upward. The system is also less appropriate for low-vigor sites or varieties, where the extra canopy space provides little benefit and can complicate vine balance.

• Yields 30 to 50 percent higher than VSP in documented trials, with no measured reduction in wine quality or fruit chemistry
• Labor increase for shoot positioning estimated at around 25 percent more than VSP; infrastructure cost is minimal when converting from an existing VSP system
• Poorly suited to low-vigor sites or low-vigor varieties; the divided canopy delivers its benefits only where excess vigor is the primary management challenge

Scott Henry belongs to the family of divided-canopy training systems developed in the second half of the twentieth century to manage vine vigor more effectively than single-curtain VSP or cordon methods. The Geneva Double Curtain, developed at Cornell University, divides the canopy horizontally into two parallel hanging curtains and requires wider row spacing. The Smart-Dyson system is closely related to Scott Henry but is spur-pruned rather than cane-pruned, with spurs pointing both upward and downward from a mid-height cordon; this makes it more amenable to mechanical pre-pruning. Scott Henry's cane-pruned structure makes the separation of upward and downward shoots easier to achieve cleanly. All three systems share the underlying principle that shade is a primary enemy of fruit quality and that expanding canopy surface area, rather than reducing it by hedging, is the more productive response to high vigor.

• Geneva Double Curtain divides the canopy horizontally and requires wider row spacing; Scott Henry divides it vertically and is compatible with standard row spacing
• The Smart-Dyson system is similar to Scott Henry but uses spur pruning from a single mid-height cordon, making it better suited to mechanical pre-pruning
• All divided-canopy systems rest on the canopy-management principle that minimizing shade improves yield, fruit quality, and disease resistance