Early in a crop's life, nitrogen tends to dominate the nutrition conversation — pushing vegetative growth, building canopy, establishing the plant. But as a crop moves toward ripening and harvest, the nutritional priority shifts entirely, and potassium becomes the element doing most of the heavy lifting for fruit size, sugar accumulation, color development, and overall produce quality. Valagro Plantafol 5.15.45 is formulated specifically for this later-stage window, carrying a 5-15-45 NPK ratio that's deliberately skewed toward potassium rather than nitrogen.
Like the rest of the Plantafol range, this formula is built around high purity and full water solubility, with its micronutrient content chelated using EDTA — a detail that matters because chelation keeps trace elements stable and available for plant uptake rather than reacting with other compounds in the spray tank or soil and becoming unusable to the plant.
| Detail | Specification |
|---|---|
| Brand | Valagro |
| Product Name | Plantafol 5.15.45 |
| Product Type | Water-Soluble NPK Foliar Fertilizer |
| Form | Water-Soluble Microcrystals |
| Micronutrients | EDTA Chelated |
| Pack Size | 1 kg |
| Nutrient | Content |
|---|---|
| Nitrogen (N) | 5% |
| Phosphorus (P₂O₅) | 15% |
| Potassium (K₂O) | 45% |
| Micronutrients | EDTA Chelated Trace Elements |
A 5-15-45 ratio keeps nitrogen deliberately low relative to potassium — a design choice rather than a limitation. Heavy nitrogen application during fruit ripening tends to push the plant back toward vegetative growth (more leaves, more shoots) at exactly the point when energy should be directed into fruit filling and sugar accumulation instead. By keeping nitrogen minimal and potassium dominant, Plantafol 5.15.45 supports the plant's natural shift toward reproductive and quality-focused development during this specific growth window.
| Crop Category | Typical Use Window |
|---|---|
| Fruit Crops | Ripening and pre-harvest fruit quality stage |
| Vegetables | Fruit or bulb filling and maturation stages |
| Field Crops | Grain or seed filling stage |
Plantafol 5.15.45 is primarily formulated for foliar application, though it can also be used for root-zone (soil/fertigation) application with some adjustment in approach.
| Application Method | Recommended Dose |
|---|---|
| Foliar Spray | As per product label recommendation |
| Root Application (Soil/Fertigation) | 1–2 gm per litre of water |
For root application specifically, thorough dilution and even distribution across the root zone supports better assimilation, and pairing it with a liquid organic fertilizer is sometimes recommended for improved overall effect. Since exact foliar dosage can vary by crop and growth stage, always confirm the specific rate from the current product label before large-scale field use.
What is the NPK composition of Plantafol 5.15.45?
It contains 5% Nitrogen, 15% Phosphorus (P₂O₅), and 45% Potassium (K₂O), along with EDTA chelated micronutrients.
Why is potassium so much higher than nitrogen in this formula?
This ratio is specifically designed for the fruit ripening and quality development stage, where high potassium supports sugar accumulation, fruit size, and color, while low nitrogen avoids pushing the plant back into excessive vegetative growth.
Can Plantafol 5.15.45 be applied to the soil instead of as a foliar spray?
Yes, it can be used for root application at 1–2 gm per litre of water, though it is primarily formulated for foliar use.
When during the crop cycle should this product be applied?
It's best suited to the fruit filling, ripening, or grain-filling stage, rather than the early vegetative growth phase.
Disclaimer: The details provided are for informational guidance only. Always adhere to the recommended application instructions as stated on the product label and in the accompanying leaflet.
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