Organic fertilization program for corn/maize
Complete organic fertilization program for grain and silage maize based on BBCH phenological stages. Intensive vegetative growth (V7-V14) and flowering-pollination (R1) are the critical phases where nitrogen nutrition and biostimulants determine the number of kernels per cob and final grain weight.
All listed products are certified CE 2018/848, NOP USDA and JAS — suitable for certified organic production
Application calendar by phenological phase
Pre-sowing and emergence
BBCH 00-09Products
Dose
PHOSMAX 20: 3 L/ha · TERRA HUMID: 5 L/ha · FULVEX 50S: 1 kg/ha
Objective
Prepare the soil, stimulate germination and ensure uniform emergence
Early vegetative growth (V1-V6)
BBCH 11-19Products
Dose
NITROTECH 16: 6-8 kg/ha · BOOST UNIVERSAL: 2 L/ha
Objective
Vigorous root system start and stimulation of early leaf growth
Intensive vegetative growth (V7-V14)
BBCH 30-39Dose
NITROTECH 2.5: 5 L/ha · NITROTECH 16: 6 kg/ha · BOOST UNIVERSAL: 2 L/ha
Objective
Maximum nitrogen topdressing at the crop's peak demand to maximise leaf area index
Tassel emergence (VT)
BBCH 51-59Products
Dose
BOOST UNIVERSAL: 3 L/ha · MICRO PLUS 1-0-0: 2 L/ha
Objective
Prepare the plant for flowering: supply micronutrients and reduce pre-pollination stress
Flowering and pollination (R1)
BBCH 61-69Products
Dose
BOOST UNIVERSAL: 3 L/ha
Objective
Protect pollen from water and heat stress and maximise kernel set on the cob
Grain filling (R2-R6)
BBCH 71-89Products
Dose
K-FLOW 20: 5 L/ha · PK-FLOW 20: 3 L/ha
Objective
Maximise grain weight and cob specific weight, with potassium for starch synthesis
Post-harvest — soil preparation
Post-cosechaProducts
Dose
TERRA HUMID: 5 L/ha · PHOSMAX 20: 3 L/ha
Objective
Restore soil organic matter after harvest and prepare the next season
| Phase | BBCH | Products | Dose | Objective |
|---|---|---|---|---|
| Pre-sowing and emergence | BBCH 00-09 | PHOSMAX 20: 3 L/ha · TERRA HUMID: 5 L/ha · FULVEX 50S: 1 kg/ha | Prepare the soil, stimulate germination and ensure uniform emergence | |
| Early vegetative growth (V1-V6) | BBCH 11-19 | NITROTECH 16: 6-8 kg/ha · BOOST UNIVERSAL: 2 L/ha | Vigorous root system start and stimulation of early leaf growth | |
| Intensive vegetative growth (V7-V14) | BBCH 30-39 | NITROTECH 2.5: 5 L/ha · NITROTECH 16: 6 kg/ha · BOOST UNIVERSAL: 2 L/ha | Maximum nitrogen topdressing at the crop's peak demand to maximise leaf area index | |
| Tassel emergence (VT) | BBCH 51-59 | BOOST UNIVERSAL: 3 L/ha · MICRO PLUS 1-0-0: 2 L/ha | Prepare the plant for flowering: supply micronutrients and reduce pre-pollination stress | |
| Flowering and pollination (R1) | BBCH 61-69 | BOOST UNIVERSAL: 3 L/ha | Protect pollen from water and heat stress and maximise kernel set on the cob | |
| Grain filling (R2-R6) | BBCH 71-89 | K-FLOW 20: 5 L/ha · PK-FLOW 20: 3 L/ha | Maximise grain weight and cob specific weight, with potassium for starch synthesis | |
| Post-harvest — soil preparation | Post-cosecha | TERRA HUMID: 5 L/ha · PHOSMAX 20: 3 L/ha | Restore soil organic matter after harvest and prepare the next season |
Complete program
Download the Corn/Maize fertilization program
PDF with complete BBCH table, doses and product sheets
FAQs about Corn/Maize fertilization
How many nitrogen applications does organic maize need?
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Organic maize needs three nitrogen inputs: one in early vegetative growth (V1-V6) to start the root system, one in intensive growth (V7-V14) as the main topdressing — the stage of highest nitrogen use — and optionally a third at the onset of tasselling on soils prone to leaching. NITROTECH 16 and NITROTECH 2.5 build an efficient programme without leaching risk.
Why is flowering (R1) the most critical stage in maize?
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Maize flowering (R1, stage VT-R1) is the window in which the number of grains per cob is set. Water or heat stress during the 10-15 days of pollination can cut grain set by 30-50%. Applying BOOST UNIVERSAL at R1 improves pollen viability and ovule fertilisation, reducing the number of empty positions on the cob.
Can this programme be used for silage maize as well as grain?
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Yes. The programme is valid for both grain and silage maize. In silage maize, the grain filling objective (R2-R6) is aimed at maximising starch content and the energy value of the silage, so applications of K-FLOW 20 and PK-FLOW 20 are especially important. Harvest is best at peak dry matter content (30-35%), which is compatible with the protocol applied.
Part of the Ecoganic crop program