Product Type
Solid potassium fertilizer with humic and fulvic acids
RENK SOLID
Highly soluble solid potassium fertilizer with humic and fulvic acids for fruit sizing, ripening, sugar accumulation, colour, yield and K deficiency correction.
RENK SOLID is a highly concentrated, highly soluble potassium fertilizer containing humic and fulvic acids. Its composition combines 30% potassium oxide (K₂O) with 30% total humic extract, including a high proportion of fulvic acids.
The fulvic fraction supports rapid nutrient assimilation and can improve membrane permeability and nutrient absorption. In soil, fulvic acids act as natural complexing agents, helping convert bound cations into more readily assimilable forms while supporting soil structure, aeration and root development.
Technical Profile
Key product information at a glance.
Formulation
Highly soluble solid
Origin
Imported from EU
Key Composition
30% K₂O · 30% Total Humic Extract · 27% Fulvic Acids · 3% Humic Acids · 2% N
Application
Foliar spray · Fertigation · Soil application
Available Pack Sizes
1 kg · 5 kg · 20 kg · 500 kg
Composition and guaranteed analysis
| Composition | % w/w |
|---|---|
| Potassium (K₂O) | 30.0 |
| Total Humic Extract | 30.0 |
| Fulvic Acids | 27.0 |
| Humic Acids | 3.0 |
| Nitrogen (N) | 2.0 |
Key benefits and agronomic effects
- Prevents and corrects potassium deficiencies in crops.
- Supports fruit sizing and firmness.
- Promotes earlier and more uniform ripening.
- Supports more intense fruit colour.
- Helps improve crop quality and yield.
- Supports sugar accumulation and other reserve substances.
How it works / Technical advantages
RENK SOLID combines fast-assimilable potassium with a high fulvic-acid content. Fulvic acids have a smaller molecular size than humic acids and are described as more reactive, supporting rapid plant response and improved nutrient absorption.
In the soil, the fulvic fraction acts as a natural complexing agent, forming fulvates with bound cations and helping make nutrients more available to the plant. The formulation also supports soil aeration, clay flocculation and root growth.
Application rates and timing
Application Guidance: Foliar: 3-4 kg/ha, with an optimal concentration of 300-400 g/hL. Maximum concentration is 1000 g/hL, or 500 g/hL on young and fragile foliage. Fertigation: 7-15 kg/ha per application, diluted to a maximum of 10% in the mother solution. Prioritize active periods of high nutrient demand, especially vegetative growth, fruit set and fruit development.
Foliar application
| Crops | Timing | Dose | Notes |
|---|---|---|---|
| Vineyard | Start from fruit set (nouaison) and continue during ripening | 3-4 kg/ha · Optimal concentration: 300-400 g/hL | 2-4 applications separated by 10-15 days. Maximum concentration: 1000 g/hL. On young and fragile foliage: maximum 500 g/hL. |
| Fruit trees: stone fruits and pome fruits | From the beginning of fruit growth until 2 weeks before harvest | 3-4 kg/ha · Optimal concentration: 300-400 g/hL | 2-3 applications separated by 15 days. Maximum concentration: 1000 g/hL. On young and fragile foliage: maximum 500 g/hL. |
| Field crops: beets, potatoes and taproots | On sufficiently developed foliage | 3-4 kg/ha · Optimal concentration: 300-400 g/hL | 3-5 interventions. Maximum concentration: 1000 g/hL. On young and fragile foliage: maximum 500 g/hL. |
| Vegetables: tomato, pepper, melon and similar crops | On sufficiently developed foliage | 3-4 kg/ha · Optimal concentration: 300-400 g/hL | 3-5 interventions. Maximum concentration: 1000 g/hL. On young and fragile foliage: maximum 500 g/hL. |
Fertigation / drip irrigation
| Crops | Timing | Dose | Notes |
|---|---|---|---|
| All crops | During active periods of highest nutrient demand, particularly vegetative growth, fruit set and fruit development | 7-15 kg/ha per application | Dilute to a maximum of 10% in the mother solution. |
Additional technical information
Target problem / deficiency symptoms
RENK SOLID is intended to prevent or correct potassium deficiency and to support crops during high potassium-demand periods. It is particularly suited to programmes focused on fruit sizing, firmness, colour, ripening, sugar accumulation, reserve substances, yield and quality.
Frequently asked questions
What is RENK SOLID?
RENK SOLID is a highly soluble solid potassium fertilizer containing humic and fulvic acids for foliar and fertigation programmes.
What is the composition of RENK SOLID?
It contains 30% potassium (K₂O), 30% total humic extract, 27% fulvic acids, 3% humic acids and 2% nitrogen on a % w/w basis.
What is RENK SOLID used for?
It is used to prevent or correct potassium deficiency and to support fruit sizing, ripening, colour, sugar accumulation, yield and crop quality.
Why does RENK SOLID contain fulvic acids?
Fulvic acids support nutrient absorption and act as natural complexing agents in the soil, helping improve nutrient availability and root-zone performance.
What is the foliar dose of RENK SOLID?
The general foliar dose is 3-4 kg/ha, with an optimal spray concentration of 300-400 g/hL.
What is the maximum foliar concentration?
The maximum concentration is 1000 g/hL. On young and fragile foliage, do not exceed 500 g/hL.
What is the fertigation dose of RENK SOLID?
Apply 7-15 kg/ha per application and dilute to a maximum of 10% in the mother solution.
When should RENK SOLID be applied?
Apply during active periods of high nutrient demand, particularly vegetative growth, fruit set and fruit development.
Can RENK SOLID be used on vineyards and fruit trees?
Yes. Vineyard applications begin from fruit set and continue during ripening, while fruit-tree programmes start at early fruit growth and continue until two weeks before harvest.
What pack sizes are available?
RENK SOLID is available in 1 kg, 5 kg and 20 kg bags and a 500 kg big bag.
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