Organic fertilization for citrus
Citrus crops are very demanding in nitrogen and potassium, and especially sensitive to excess chlorides. Well-planned organic fertilization improves fruit size, juice content, rind color and post-harvest life.
Recommended products for citrus
All certified CE 2018/848 + NOP USDA.
NITROTECH 2.5
Fast-assimilation organic nitrogen. Key during the citrus peak N demand phase after winter.
NPK 2.5-0-0 · 1 L, 5 L, 10 L
NITROTECH 10
Higher N concentration for intensive vegetative growth phases without adding chlorides.
NPK 10-0-0 · 10 L, 20 L, 300 L
PHOSMAX 20
Assimilable phosphorus to stimulate flowering, fruit set and root development.
NPK 0-20-0 · 1 L, 5 L, 10 L
K-FLOW 20
Fluid potassium from organic sources, not muriate of potash. Improves fruit size, juice, external colour and rind quality.
NPK 0-0-20 · 10 L, 20 L, 1000 L
CALCIUM 40
Micronized calcium to prevent fruit physiological disorders and improve post-harvest firmness.
NPK 0-0-0+Ca · 1 L, 5 L, 10 L
MICRO PLUS 1-0-0
Chelated micronutrient complex (Zn, Mn, B, Cu, Mg) to correct deficiencies common in calcareous soils.
NPK 1-0-0 · 1 L, 5 L, 10 L
BOOST UNIVERSAL
Freshwater unicellular algae biostimulant. Improves nutrient absorption and stress response.
NPK 0-0-1 · 1 L, 5 L, 10 L
The programme, product by product
These must not share a tank (5)
- NITROTECH 10 + PHOSMAX 20
- PHOSMAX 20 + K-FLOW 20
- PHOSMAX 20 + CALCIUM 40
- K-FLOW 20 + MICRO PLUS 1-0-0
- CALCIUM 40 + MICRO PLUS 1-0-0
Chloride measured by ion chromatography to UNE-EN 10304-1 at an ENAC-accredited laboratory. Mixing verdicts are derived from each product's composition and pH, not from a compatibility trial: always run the jar test with your own field water before loading.
See the full compatibility table →FAQs about citrus fertilization
Why is it important to use chloride-free fertilizers for citrus?
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Citrus is one of the most sensitive crops to chlorides. Excess chlorides in the soil or applied fertilizers can cause phytotoxicity, leaf burn, leaf drop and reduced fruit quality. Eight references have measured chloride below the limit of detection (< 0.05 % w/w) by ion chromatography UNE-EN 10304-1 at an ENAC-accredited laboratory. For the rest of the catalogue we publish the figure as each reference is analysed: organic certification does not attest to it.
What does potassium contribute to citrus?
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Potassium in citrus improves fruit size, juice content, rind color, transport resistance and post-harvest life. Ecoganic K-FLOW 20 provides potassium in fluid form and without chlorides, ideal for fertigation.
Are they certified for organic citrus with PDO/PGI?
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Yes. Ecoganic CE 2018/848 certified products are suitable for certified organic production, including crops with protected designations of origin and geographical indications.
Why chloride matters in citrus
Citrus is one of the crops where chloride sensitivity shapes management from planting onwards: the ability to exclude the chloride ion is a recognised rootstock selection criterion. Chloride accumulates at the leaf margin, competes with nitrate uptake and raises soil solution conductivity — which is what ends up limiting fruit size.
Ecoganic fertilizers and biostimulants add no chloride and no sodium, because they start from bioreactor-grown freshwater microalgae rather than marine seaweed. That is a fact of composition, not a promised outcome.