3.2 Training, Pruning, Canopy Management, and Harvest

Once variety and farming approach are set, the grower’s annual craft is training, pruning, canopy management, and harvest. These decisions control yield, ripeness, tannin/phenol development, and disease risk — and they appear constantly in Level 3 theory questions.

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Training: Building the Permanent Framework

Training establishes the shape of permanent wood (trunk and lasting arms). Two foundational ideas appear throughout classic regions:

Head Training

In head-trained vines, permanent wood is concentrated around the top of a short trunk — a “head” — with arms radiating from that point. Many Mediterranean bush vines (gobelet) are head-trained and often untrellised. Advantages can include drought resilience, lower capital cost (no extensive wirework), and suitability for some old-vine sites. Challenges include harder mechanisation and, if unmanaged, a dense, disease-prone canopy.

Cordon Training

In cordon-trained vines, one or more permanent horizontal arms (cordons) are retained along a wire. Fruiting wood is renewed on those cordons (usually as spurs). Cordons suit many trellised systems and machine operations because geometry is predictable and shoots can be positioned between foliage wires.

Training is decided at establishment and changed only with major reworking; pruning is the yearly renewal within that framework.

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Pruning: Spur vs Replacement Cane (Exam Trap Zone)

Winter pruning selects which one-year wood remains and how many buds are kept — the primary yield control before the season starts.

Spur Pruning

Spur pruning retains short sections of one-year wood cut back to roughly two buds (spurs), usually spaced along a permanent cordon (or sometimes on a head). Each spur produces shoots; after the season those shoots become next year’s spurs or are cut away. Spur systems are relatively quick to prune and easy to standardise for labour or machines.

Replacement-Cane Pruning

Replacement-cane pruning (often associated with Guyot-type systems) retains one or more long canes of one-year wood, laid along a fruiting wire, plus typically a spur that will grow the cane for the following year. After harvest, the fruited cane is removed and replaced by a new cane grown from last year’s spur (hence “replacement”). This renews fruiting wood each year without relying on a permanent cordon for spur positions.

Trap: Do not confuse training with pruning. A vine can be head-trained yet cane-pruned, or cordon-trained and spur-pruned. Spur ≠ cane; cordon ≠ Guyot.

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Trellised vs Untrellised Canopy Management

Trellised Systems

Trellises use posts and wires to support permanent wood and to position shoots. Vertical shoot positioning (VSP) is a common pattern: shoots are tucked upward between foliage wires, creating a narrow “wall” of leaves with fruit in a defined zone. Benefits include better spray penetration, more even light/air around bunches, and compatibility with machine harvesting and hedging.

Untrellised Systems

Untrellised vines (classic bush vines) stand without a full wire canopy. Shoots may sprawl or be minimally supported. In hot, dry climates a bush canopy can shade fruit and soil, reducing sunburn and evaporation. In humid climates, dense untamed bush canopies raise fungal risk.

Canopy Work During the Season

Regardless of system, canopy management adjusts leaf/fruit balance and microclimate:

• Shoot thinning / disbudding — removes excess shoots to reduce yield and congestion.
• Leaf removal (especially around the fruit zone) — increases light and air; can improve ripening and lower rot, but excessive exposure risks sunburn.
• Hedging / tipping — controls shoot length and encourages lateral balance in vigorous sites.
• Green harvesting (crop thinning) — drops immature bunches to concentrate ripening in remaining fruit.

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Planting Density

Density (vines per hectare) interacts with soil vigour, water, and training. High density can encourage competition that limits individual vine vigour and may favour quality in fertile sites when water is adequate; low density may suit dry, poor soils where each vine needs a larger root zone. Density is not a quality score by itself — it must match site potential and the chosen training system.

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Harvest: Timing and Method

Timing

Harvest timing is among the most important quality decisions. Growers track sugar (potential alcohol), acid, pH, flavour ripeness, and tannin ripeness (for reds). Picking too early can mean green flavours and harsh acidity; too late can mean flat acidity, overripe flavours, and raisining. Weather forecasts matter: rain before harvest can dilute or split berries and trigger rot.

Hand Harvest

Manual harvest allows selective picking (ripe bunches only, rejection of rot), suits steep terraces and high-quality sparkling base wines, and is essential for whole-bunch or gentle handling goals. It is labour-intensive and costly.

Machine Harvest

Machine harvest shakes or beats berries from the vine into catchers. It requires relatively flat land, suitable trellising, and varieties/vineyards that tolerate mechanical shaking. Advantages are speed and cost on large, uniform sites — critical when a heat spike or rain threatens. Disadvantages include less selectivity, more MOG (matter other than grapes), and unsuitability for many premium whole-bunch programmes or steep sites.

Linking Back to Style

Training and pruning set the bud number and canopy architecture that determine how evenly a vineyard ripens; canopy work fine-tunes light and airflow; harvest locks in the sugar/acid/flavour balance that winemaking will interpret. For SAQs, always connect a human choice (for example leaf removal on the morning-sun side only) to a hazard or quality goal (sunburn vs ripeness).

Key Takeaways

• Train permanent wood (head vs cordon); prune one-year wood (spur vs replacement cane).
• Trellis enables shoot positioning and mechanisation; bush vines trade wires for simplicity and shade in dry climates.
• Harvest is a ripeness decision first; method follows site, labour, and wine style.