Organic fertilization for tomato
Tomato is one of the most intensive crops in terms of nutritional demand. It requires a balanced program covering all growth stages: transplanting, flowering, fruit set, bulking and ripening. Calcium is especially critical to prevent blossom end rot.
Recommended products for tomato
Organic fertilizers certified CE 2018/848 + NOP USDA.
NITROTECH 2.5
Fast-absorption organic nitrogen for crop start-up and initial root development.
NPK 2.5-0-0 · 1 L, 5 L, 10 L
PHOSMAX 20
Assimilable phosphorus to stimulate flowering, fruit set and root development.
NPK 0-20-0 · 1 L, 5 L, 10 L
PK-FLOW 20
PK 20-20 to optimize bulking and ripening. Improves fruit size and soluble solids content (BRIX).
NPK 0-20-20 · 1 L, 5 L, 10 L
CALCIUM 40
Micronized calcium <1μm to prevent blossom-end rot, especially under heat conditions.
NPK 0-0-0+Ca · 1 L, 5 L, 10 L
BOOST UNIVERSAL
Unicellular algae biostimulant. Improves stress tolerance and nutrient absorption throughout the cycle.
NPK 0-0-1 · 1 L, 5 L, 10 L
The programme, product by product
These must not share a tank (2)
- PHOSMAX 20 + CALCIUM 40
- PK-FLOW 20 + CALCIUM 40
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 tomato fertilization
How do you correct nitrogen deficiency or excess in tomato?
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Nitrogen deficiency in tomato shows as yellowing of older leaves (chlorosis), weak plants and poor fruit set; it is corrected with fast-assimilation organic nitrogen such as NITROTECH 2.5. Nitrogen excess, conversely, causes excessive vegetative growth, delayed ripening, soft fruit and greater susceptibility to pests and diseases; it is corrected by balancing with potassium (PK-FLOW 20) and calcium (CALCIUM 40) and reducing nitrogen input. The goal is an N-K-Ca balance adjusted to each crop stage.
Why is calcium so important in organic tomato?
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Calcium is fundamental for fruit cell wall integrity. Calcium deficiency, especially accompanied by high temperatures or irrigation irregularities, causes blossom-end rot. Ecoganic CALCIUM 40, with ultrafine particles <1μm, has especially effective foliar absorption to prevent this problem.
Can I use the tomato program in greenhouse?
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Yes. All products are suitable for both open-field and greenhouse tomato. In greenhouses, drip fertigation is the most efficient method of applying liquid products.
Verified field trial