Organic fertilization program for citrus
Organic fertilization program for orange, lemon and mandarin based on BBCH stages. Special focus on calcium management during June drop and fruit bulking.
All listed products are certified CE 2018/848, NOP USDA and JAS — suitable for certified organic production
Application calendar by phenological phase
Spring budbreak
BBCH 09-12Products
Dose
NITROTECH 2.5: 4-6 L/ha · BOOST UNIVERSAL: 2-3 L/ha
Objective
Activate budbreak and supply nitrogen for initial vegetative growth
Flowering
BBCH 61-69Dose
BOOST UNIVERSAL: 3 L/ha · UNIVERSAL POWER: 2 L/ha · CALCIUM 40: 2 L/ha
Objective
Improve fruit set and supply calcium for young fruit cell division
June drop — fruit set
BBCH 71-74Dose
CALCIUM 40: 3 L/ha · NITROTECH 16: 5 kg/ha · BOOST UNIVERSAL: 2 L/ha
Objective
Reduce physiological fruit drop and reinforce calcium in cell walls
Fruit bulking
BBCH 75-79Products
Dose
NITROTECH 16: 5 kg/ha · K-FLOW 20: 5 L/ha · CALCIUM 40: 3 L/ha
Objective
Peak nutritional demand. Cover nitrogen, potassium and calcium for size and quality
Ripening — coloring
BBCH 81-89Products
Dose
K-FLOW 20: 5 L/ha · PK-FLOW 20-20: 4 L/ha
Objective
Potassium for coloring, sugars and organoleptic quality of the fruit
Post-harvest
Post-cosechaDose
NITROTECH 2.5: 4 L/ha · PHOSMAX 20: 3 L/ha · TERRA HUMID: 5 L/ha
Objective
Tree recovery and replenishment of reserves for the next season
| Phase | BBCH | Products | Dose | Objective |
|---|---|---|---|---|
| Spring budbreak | BBCH 09-12 | NITROTECH 2.5: 4-6 L/ha · BOOST UNIVERSAL: 2-3 L/ha | Activate budbreak and supply nitrogen for initial vegetative growth | |
| Flowering | BBCH 61-69 | BOOST UNIVERSAL: 3 L/ha · UNIVERSAL POWER: 2 L/ha · CALCIUM 40: 2 L/ha | Improve fruit set and supply calcium for young fruit cell division | |
| June drop — fruit set | BBCH 71-74 | CALCIUM 40: 3 L/ha · NITROTECH 16: 5 kg/ha · BOOST UNIVERSAL: 2 L/ha | Reduce physiological fruit drop and reinforce calcium in cell walls | |
| Fruit bulking | BBCH 75-79 | NITROTECH 16: 5 kg/ha · K-FLOW 20: 5 L/ha · CALCIUM 40: 3 L/ha | Peak nutritional demand. Cover nitrogen, potassium and calcium for size and quality | |
| Ripening — coloring | BBCH 81-89 | K-FLOW 20: 5 L/ha · PK-FLOW 20-20: 4 L/ha | Potassium for coloring, sugars and organoleptic quality of the fruit | |
| Post-harvest | Post-cosecha | NITROTECH 2.5: 4 L/ha · PHOSMAX 20: 3 L/ha · TERRA HUMID: 5 L/ha | Tree recovery and replenishment of reserves for the next season |
Complete program
Download the citrus fertilization program
PDF with complete BBCH table, doses and product sheets
FAQs about citrus fertilization
How can June drop in organic citrus be reduced?
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June drop is a natural physiological phenomenon in citrus, but it can be minimized with adequate calcium fertilization during the BBCH 71-74 period. Calcium strengthens the cell wall of young fruit and reduces abscission. Algae biostimulants applied at flowering also improve fruit retention and reduce the drop rate.
Why is calcium so important in citrus fertilization?
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Calcium is essential in citrus for three reasons: 1) It strengthens fruit cell walls, reducing physiological drop. 2) It improves fruit firmness and post-harvest shelf life. 3) It prevents physiological disorders such as fruit splitting. In organic production, Ecoganic CALCIUM 40 provides micronized calcium with high foliar and root bioavailability.
Can Ecoganic products be mixed in the same spray solution?
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Most Ecoganic products are compatible with each other in foliar application. It is recommended to perform a miscibility test with small volumes before combining more than two products. Our technical team can guide you on the most effective combinations for each crop phase.