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Fertilizer for olive trees

Olive trees: how and why to use fertilization

Although the olive tree appears as a fairly rustic and therefore undemanding plant, able to live and be able to produce with only the nutritional elements it obtains from the soil, its fertilization is necessary, especially if you want to obtain a abundant and quality production.First of all, before proceeding with fertilization, it is necessary to know the characteristics of the soil and the physiology of the tree, as well as the agronomic techniques to be adopted in the olive grove. Usually the olive tree prefers medium-textured and well-drained soils, on the contrary it is not suitable for growing in too clayey soils. The fertilization of the olive tree is therefore necessary to integrate the nutritional elements absent in the soil or to reintegrate them after they have been removed from the plant through the fall of the leaves,


During the year, two interventions are sufficient to be carried out during the vegetative season, that is, during budding and fruiting. The flowering of the olive tree takes place in May, when the daytime temperature is between 20 ° C and 25 ° C and the rains are scarce; all climatic conditions are very important for fruit set and pollination.The best times to fertilize therefore coincide with the end of winter (between February and March), to favor budding, and with late spring (late June and early July) in favor of vegetative activity. In this season the olive tree needs a greater quantity of nutritional elements than the rest period. Eventually a third intervention can also be carried out in autumn, the vegetative rest period of the plant. An abundant fertilization or a too vigorous pruning result in a minimum flowering, as well as a modest fruit set. Fertilization must therefore be fair and balanced for both vegetative and productive activity. In case of too much vigor of the plant it is good to reduce the quantity of fertilizer and reduce pruning to a minimum.

Olives: the best composition of the fertilizer


Fertilizers are generally based on nitrogen, present in the soil to a lesser extent than potassium and phosphorus. However, the composition of the fertilizer must take into account the soil, the state of the olive tree and the pruning interventions carried out.Generally for the two main fertilization interventions, in late winter and late spring, nitrogen fertilizers are used, while in autumn it is necessary to use a mixed fertilizer of nitrogen and potassium.Nitrogen, in particular, controls the vigor of the plant and its vegetative and productive state. So a nitrogen deficiency can cause less growth and poor production. However, nitrogen excesses can also be harmful to the later ripening of the plant and to parasitic attacks. Phosphorus, on the other hand, regulates growth and fruiting, while potassium favors the accumulation of starch, regulating the water balance of the plant and increases its resistance to environmental climatic adversities. We also remind you that every 3 or 4 years it is advisable to analyze the soil and that all the necessary treatments must be carried out during the coolest hours of the day.

Fertilizer for olive trees: Olive tree: the best fertilization techniques


The fertilizers can be administered together with the irrigation water, according to the fertigation technique, if localized irrigation is available. ) or other easily available organic material. This technique is recommended to maintain a good level of humus in the soil. For autumn fertilization it is preferable to broadcast fertilizer, such as seeds, to be carried out manually or with specific machines. It can also be vegetable broadcasting, that is based on pruning remains to be buried. Lately a foliar fertilization with urea (nitrogen composition) or with commercial preparations based on microelements is increasingly in use.

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