High-Density Pistachio Orchards in Castile-La Mancha (Spain): Tree Training in the Early Years
Within a pedoclimatic context typical of Castile-La Mancha, an area particularly well suited to pistachio cultivation, a plantation in its first year of vegetative activity has been observed, established with a spacing of 6 × 3 m (approximately 550 trees per hectare). The adopted approach reflects the principles of the ZaragoZa® system, adapted to the physiology of pistachio and to the objectives of modern, mechanized management.
Tree training begins with a key
structural element: a trunk completely free of branches up to approximately
80–90 cm above ground level. This technical choice allows for improved light
management, enhances canopy aeration, and, above all, prepares the tree for
efficient continuous mechanical harvesting in the future.
Above this height, the first
primary branches develop, forming the foundation of the productive structure.
The goal is not to impose a rigid shape, but rather to guide the tree toward a
multi-branched, stable, and balanced configuration. In this context, horizontal
topping and vertical edging play a strategic role: by intercepting the
vegetative apex, they stimulate the emission of new lateral shoots. Repeating
this process over one or two vegetative cycles results in a progressively
denser and more evenly distributed canopy.
The management of vigorous
shoots, often referred to as “bull” shoots, is another critical aspect. These
shoots, characterized by strong apical dominance, can be controlled through
light pruning or allowed to develop until natural bending and self-regulation
occur. In both cases, the objective is to promote a physiological curvature
that encourages the formation of lateral fruiting branches, transforming
excessive vegetative growth into a productive advantage.
The expected outcome is a
bush-like tree structure, low in height, well-branched, and capable of
intercepting light uniformly. This model enables earlier entry into production
and simplifies long-term management.
From an operational perspective,
the adopted system is already oriented toward harvesting. The tree structure is
suitable both for the use of shaker machines with interception systems and for
simpler solutions involving ground nets and assisted harvesting with vibrating
arms. The choice will depend on farm size and the level of mechanization.
In summary, the first year
represents a decisive phase: it is not a matter of waiting for the tree to
grow, but of guiding its development with precision. Proper initial training
allows for the establishment of an efficient, sustainable, and truly productive
orchard over the medium to long term.
Editorial Note:
Original content by Agronomist Vito Vitelli, developed and optimized with the
support of artificial intelligence tools for educational, informational, and
technical dissemination purposes.
Outreach activity carried out in
collaboration with:

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