Modern Hazelnut Cultivation: the “Single-Stem” System Transforming Orchards into Productive Fruit Farms

In the Avellino area, a region historically suited to hazelnut cultivation, agronomist Dr. Vito Vitelli, together with agricultural entrepreneur Giuseppe Lari, are developing an innovative approach to modern orchard management based on the “single-stem” system. This method aims to simplify plant management, improve vegetative balance, and progressively reduce labor costs.

The underlying idea is straightforward: from the moment of planting, avoid the traditional multi-stem (or “bush”) system and instead develop a single, well-defined trunk. In this way, the hazelnut tree takes on a more orderly structure, similar to that of a modern fruit orchard, making all future operations from pruning to harvesting more efficient.

The plants observed were established in 2019 and, after approximately 40 months, already show a good presence of fruiting structures. According to Vitelli, the fundamental principle is clear: branches that naturally tend to incline reduce vegetative vigor and gradually become productive. For this reason, it is important not to create excessively vigorous plants, but rather to develop well-balanced canopies rich in inclined, evenly distributed branches.

Plant management should be simple yet carefully considered. Unnecessary basal suckers are removed, overly dense inner sections are thinned, and light and air circulation within the canopy are encouraged. Often, just a few targeted cuts are sufficient to improve aeration and vegetative balance. Equally important is the concept of the “palm of the hand,” meaning the creation of space within the plant without excessively hollowing it out.

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Another noteworthy aspect concerns return cuts. By leaving small stubs after pruning, the plant produces new secondary branches that, over time, become future productive limbs. This allows the hazelnut tree to remain young, active, and in a continuous state of vegetative renewal.

Planting density is also an important consideration. In addition to traditional spacing, Vitelli suggests the possibility of significantly increasing the number of plants per hectare, reaching up to 700–800 plants/ha (5.5–6.0 × 2.5–3.0 m). The goal is to obtain more compact, well-balanced, and highly productive plants, with higher yields and lower management costs.

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The final message is clear: pruning should not be seen as a mere cutting operation, but as an ongoing dialogue with the plant. Only by achieving balance between roots, trunk, and canopy is it possible to develop a modern, sustainable, and economically competitive hazelnut orchard.

Editorial Note:
Original content by Agronomist Dr. Vito Vitelli, developed and optimized with the support of artificial intelligence tools for educational, informational, and technical enhancement purposes.

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