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 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 initial 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 top-dressing during peak maize demand to maximize 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 stress before pollination
Flowering and pollination (R1)
BBCH 61-69Products
Dose
BOOST UNIVERSAL: 3 L/ha
Objective
Protect pollen from water and heat stress, maximize grain set in the cob
Grain filling (R2-R6)
BBCH 71-89Products
Dose
K-FLOW 20: 5 L/ha · PK-FLOW 20: 3 L/ha
Objective
Maximize grain weight and cob specific weight, 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 campaign
| 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 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 initial 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 top-dressing during peak maize demand to maximize 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 stress before pollination | |
| Flowering and pollination (R1) | BBCH 61-69 | BOOST UNIVERSAL: 3 L/ha | Protect pollen from water and heat stress, maximize grain set in the cob | |
| Grain filling (R2-R6) | BBCH 71-89 | K-FLOW 20: 5 L/ha · PK-FLOW 20: 3 L/ha | Maximize grain weight and cob specific weight, 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 campaign |
Complete program
Download the maize fertilization program
PDF with complete BBCH table, doses and product sheets
FAQs about organic maize fertilization
How many nitrogen applications does organic maize need?
+
Organic maize requires 3 nitrogen inputs: one at early vegetative growth (V1-V6) for root system start-up, one at intensive growth (V7-V14) as the main top-dressing — the phase of highest nitrogen consumption — and optionally a third at early tasseling on highly leachable soils. NITROTECH 16 and NITROTECH 2.5 structure an efficient program without leaching risk.
Why is flowering (R1) the most critical phase in maize?
+
Maize flowering (R1, VT-R1 stage) is the window where the number of kernels per cob is determined. Water or heat stress during the 10-15 days of pollination can reduce kernel set by 30-50%. Applying BOOST UNIVERSAL at R1 improves pollen viability and ovule fertilization, reducing the number of 'empty kernels' in the cob.
Can this program be used for silage maize as well as grain maize?
+
Yes. The program is valid for both grain and silage maize. In silage maize, the goal during grain filling (R2-R6) is to maximize starch content and the energy value of the silage, so K-FLOW 20 and PK-FLOW 20 applications are especially important. It is recommended to harvest at peak dry matter content (30-35%), compatible with the applied protocol.
Part of the Ecoganic crop program