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
Activate tree reserves, stimulate vegetative start 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
Maximize viable flower number, stimulate 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 kernel filling initiation
Kernel filling and ripening
BBCH 81-89Products
Dose
K-FLOW 20: 5 L/ha · NITROTECH 2.5: 3 L/ha
Objective
Maximize kernel weight, size and pepita percentage over 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
Restore tree reserves and prepare floral initiation for the 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 | Activate tree reserves, stimulate vegetative start 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 | Maximize viable flower number, stimulate 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 kernel filling initiation | |
| Kernel filling and ripening | BBCH 81-89 | K-FLOW 20: 5 L/ha · NITROTECH 2.5: 3 L/ha | Maximize kernel weight, size and pepita percentage over total weight | |
| Post-harvest — tree recovery | Post-cosecha | NITROTECH 2.5: 4 L/ha · PHOSMAX 20: 3 L/ha · TERRA HUMID: 5 L/ha | Restore tree reserves and prepare floral initiation for the next season |
Complete program
Download the almond fertilization program
PDF with complete BBCH table, doses and product sheets
FAQs about organic almond fertilization
Why does almond need fertilization before bloom?
+
Almond blooms very early (January-March depending on variety and location) before the soil is sufficiently active to release nutrients through mineralization. For this reason, bud swell fertilization, applied foliarly when buds start to swell, is especially critical: the tree depends almost exclusively on its reserves and external supply to sustain flowering and initial fruit set.
What is the main limiting nutrient in organic almond?
+
Nitrogen and calcium are the two most critical nutrients in almond. Nitrogen determines the quantity and quality of flowers, fruit set rate and kernel filling. Calcium is decisive for cell wall resistance in young fruit — its deficiency causes premature fruit drop at set. CALCIUM 40 application at bloom-set is especially effective in almonds on calcareous soils where soil calcium has low solubility.
Can Ecoganic products be used in deficit-irrigated almond?
+
Yes. Ecoganic products are especially suitable for deficit-irrigated almonds because they contain no chlorides or sodium that increase soil salinity with repeated applications. NITROTECH 2.5 and K-FLOW 20 are 100% soluble and easily dosed in drip irrigation systems. In rainfed almond without irrigation, concentrate applications in the two weeks before each expected rainfall or spot irrigation.
Part of the Ecoganic crop program