Liquid fertilizer for olive trees: decision guide

The olive grove is a crop that greatly appreciates fertilization, whether in organic or conventional agriculture. the liquid fertilizer for olive trees It can be used both in fertigation (usually by drip) and in foliar application, covering needs more quickly.

Either way, applying liquid fertilizers is the quickest and most convenient way to cover the nutrient needs of the olive grove.

Depending on whether you have a rainfed or irrigated olive grove, you will have application constraints, summarized as follows:

  • Rainfed olive grove: granular fertilizers (mixed or complex) + foliar fertilizer applications.
  • Irrigated olive grove: liquid or water soluble fertilizers + foliar fertilizer applications.

If you need to know the complex nutritional needs of the olive grove and how to distribute nutrients in each season of the year, as well as the importance of each element, consult our guide to fertilizing the olive grove.

read more: how to fertilize the olive grove


Liquid fertilizer for olive trees in fertigation

To know the starting point of our olive grove, it is ideal to have a leaf analysiswhich will tell us the nutrient reserve from which our olive tree starts.

On the other hand, it doesn’t hurt to make a soil test to determine with what reservations we are starting this campaign and if we can reduce the number of subscribers to this campaign.

In any case, according to the bibliography (Ferreira et al, for example), each ton of olive harvest consumes the following resources:

  • 15-18 kg N (nitrogen)
  • 4 kg P2O5 (phosphorus)
  • 22.5-25 kg K2O (potassium)
  • 1 kg of CaO (calcium)
  • 2.56 kg MgO (magnesium)
  • 3-3.5kg SO3 (sulfur)

A general plan where liquid fertilizer is used for olive trees in fertigation, is divided as follows:

Era Fertilizer L/ha UFN PFU UFK
March April NPK14-4-6 350 59 17 25
May June NPK 6-3-8 450 32 16 43
July August NPK 5-3-10 550 33 twenty 66
September October NPK 5-3-10 400 24 14 48

NOTE: You can adjust the NPK formulas as needed.

Liquid fertilizer for olive trees in foliar application

The liquid fertilizer for olive trees in foliar application aims to complete and cover the nutritional needs that could not be introduced in fertigation.

This type of subscriber is very practical, especially in rainfed olive groves, since the assimilation is high and the response of the olive tree is fast.

  • Budding: NPK 15-5-5 or foliar urea (without biuret) at a dose of 10-15 L/ha.
  • Pre-flowering at the beginning of flowering: biostimulant (amino acids or auxinic marine algae), micronutrient corrector (notably iron, boron and zinc) and nutritional or phytosanitary copper for plant health.
  • Fruit setting: In addition to a phytosanitary treatment (carpophagous sprays), a biostimulant or NPK liquid fertilizer for olives is applied.
  • Fat yield: fertilizer rich in potassium and biostimulant (usually amino acids).
  • Post-harvest: application of phytosanitary copper and recovery of reserves with liquid fertilizer for olive trees rich in potassium. It is usual to apply 15-20 kg/1000L of potassium nitrate water or any other source of this element.

Due to the type of olive leaves, this culture very well admits the mixture of amino acids with phytosanitary products. It supports biostimulant treatments very well and magnificent visual results are obtained.

Source of copper for plant health:

With liquid fertilizer in fertigation, alternating shifts and sudden changes in production after each campaign are considerably reduced.

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