Organic fertilization program for almond
Complete organic fertilization program for almond based on BBCH phenological stages. Early bloom and fruit set are the most critical phases: almond blooms before the soil is active, making foliar nutrition at bud break indispensable.
All listed products are certified CE 2018/848, NOP USDA and JAS — suitable for certified organic production
Application calendar by phenological phase
Bud swell — early bud break
BBCH 01-09Dose
NITROTECH 2.5: 4 L/ha · BOOST UNIVERSAL: 2-3 L/ha · PHOSMAX 20: 3 L/ha
Objective
Mobilise tree reserves, stimulate bud break and floral initiation
Bloom — pink bud to full bloom
BBCH 54-65Dose
BOOST UNIVERSAL: 3 L/ha · CALCIUM 40: 2 L/ha · MICRO PLUS 1-0-0: 2 L/ha
Objective
Maximise the number of viable flowers and support pollination and fruit set
Fruit set and development
BBCH 71-75Products
Dose
NITROTECH 16: 5-6 kg/ha · CALCIUM 40: 3 L/ha · K-FLOW 20: 3 L/ha
Objective
Cover nitrogen, calcium and potassium demand for fruit development and retention
Endocarp hardening
BBCH 77-79Products
Dose
PK-FLOW 20: 4 L/ha · BOOST UNIVERSAL: 2 L/ha
Objective
Supply phosphorus and potassium for shell formation and the start of kernel filling
Kernel filling and ripening
BBCH 81-89Products
Dose
K-FLOW 20: 5 L/ha · NITROTECH 2.5: 3 L/ha
Objective
Maximise kernel weight, size and kernel percentage of total weight
Post-harvest — tree recovery
Post-cosechaDose
NITROTECH 2.5: 4 L/ha · PHOSMAX 20: 3 L/ha · TERRA HUMID: 5 L/ha
Objective
Replenish tree reserves and prepare floral initiation for next season
| Phase | BBCH | Products | Dose | Objective |
|---|---|---|---|---|
| Bud swell — early bud break | BBCH 01-09 | NITROTECH 2.5: 4 L/ha · BOOST UNIVERSAL: 2-3 L/ha · PHOSMAX 20: 3 L/ha | Mobilise tree reserves, stimulate bud break and floral initiation | |
| Bloom — pink bud to full bloom | BBCH 54-65 | BOOST UNIVERSAL: 3 L/ha · CALCIUM 40: 2 L/ha · MICRO PLUS 1-0-0: 2 L/ha | Maximise the number of viable flowers and support pollination and fruit set | |
| Fruit set and development | BBCH 71-75 | NITROTECH 16: 5-6 kg/ha · CALCIUM 40: 3 L/ha · K-FLOW 20: 3 L/ha | Cover nitrogen, calcium and potassium demand for fruit development and retention | |
| Endocarp hardening | BBCH 77-79 | PK-FLOW 20: 4 L/ha · BOOST UNIVERSAL: 2 L/ha | Supply phosphorus and potassium for shell formation and the start of kernel filling | |
| Kernel filling and ripening | BBCH 81-89 | K-FLOW 20: 5 L/ha · NITROTECH 2.5: 3 L/ha | Maximise kernel weight, size and kernel percentage of total weight | |
| Post-harvest — tree recovery | Post-cosecha | NITROTECH 2.5: 4 L/ha · PHOSMAX 20: 3 L/ha · TERRA HUMID: 5 L/ha | Replenish tree reserves and prepare floral initiation for next season |
Complete program
Download the Almond fertilization program
PDF with complete BBCH table, doses and product sheets
FAQs about Almond fertilization
Why does almond need fertilization before flowering?
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Almond flowers very early (January to March depending on variety and area), before the soil is active enough to release nutrients through mineralisation. Bud-swell fertilization, applied through the leaf as the buds begin to swell, is therefore especially critical: the tree depends almost entirely on its own reserves and on external supply to sustain flowering and early fruit set.
Which nutrient is most limiting in organic almond?
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Nitrogen and calcium are the two most critical nutrients in almond. Nitrogen governs the number and quality of flowers, the set rate and kernel filling. Calcium determines cell-wall strength in the young fruit — a shortage causes premature drop at set. Applying CALCIUM 40 at bloom and fruit set is especially effective in almond on calcareous soils, where soil calcium has low solubility.
Can almond under deficit irrigation be fertigated with Ecoganic products?
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Yes. Ecoganic products are well suited to almond under deficit irrigation because they contain no chloride or sodium that would raise soil salinity with repeated application. NITROTECH 2.5 and K-FLOW 20 are 100% soluble and easy to dose in drip systems. In rainfed almond, concentrate applications in the two weeks before each expected rain or supplementary irrigation.
Part of the Ecoganic crop program