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Plagron Alga Grow 0.25l
Plagron Alga Grow 250 mL is the intermediate-sized packaging of this organic vegetative nutrient based on marine algae extracts, engineered for the growth phase of soil-cultivated plants. This format bridges the gap between the trial bottle and the standard one-litre size, delivering the same concentrated organic NPK 4-2-4 formulation with six essential trace elements. Algae-derived phytohormones and amino acids support root system expansion and chlorophyll biosynthesis for vigorous, green canopy development. At 1:250 dilution, 250 mL of concentrate produces up to 62.5 litres of nutrient solution, suitable for three to five plants over a full vegetative period. Order now and provide your plants with research-backed organic nutrition.
Plagron Alga Grow 250 mL – Intermediate Organic Seaweed Nutrient
The Plagron Alga Grow 250 mL occupies the middle ground between the trial-size bottle and the standard one-litre format, making it a popular choice for growers who want to feed a small number of plants organically without purchasing a large container. The formulation based on marine algae extracts and sugar beet vinasse supplies the full spectrum of macro and micronutrients required for vigorous vegetative development. Browse the complete Plagron range to design an organic feeding protocol tailored to your cultivation setup.
Key specifications
The Alga Grow 250 mL contains precisely the same premium formulation as every other available format. Product efficacy is driven by the combination of organic primary nutrients and a comprehensive trace element suite.
- Organic NPK formulation: 4.2% total nitrogen (3.3% organically bound), 2.4% water-soluble P₂O₅ and 4.3% water-soluble K₂O
- Complete trace element suite: iron (0.020%), manganese (0.014%), boron (0.010%), zinc (0.006%), copper (0.002%) and molybdenum (0.0005%)
- Optimal pH of 5.5 and EC of 29 mS/cm ensuring direct bioavailability at the root-substrate interface
- Liquid concentrate at a density of 1.26 g/mL, producing zero foam during preparation
Application and dosage
Add a maximum of 4 mL of Alga Grow to 1 litre of water and apply this solution at every irrigation event during the vegetative stage. From 250 mL of concentrate you can prepare up to 62.5 litres of nutrient solution, a volume that comfortably supports three to five plants through an entire growth period. Shake the bottle thoroughly before each application, as the natural organic constituents may settle. Store between 0°C and 35°C, protected from freezing temperatures and direct solar exposure. Complement Alga Grow with products from the Plagron Natural assortment for optimal results.
Grower benefits
The 250 mL format offers a more competitive cost per litre than the 100 mL bottle while remaining compact enough for growers with limited storage. The organic seaweed formulation ensures a gradual nutrient release profile that prevents over-fertilisation, and the endogenous phytohormones drive compact plant morphology with short internodes and robust stem diameter. Plagron Power Roots is recognised for formulations that satisfy both hobbyists and professional cultivators through their reproducibility and consistent quality.
Combinations and alternatives
Pair the Alga Grow 250 mL with Plagron Alga Bloom 250 mL for a matched organic nutrient duo. During the early vegetative weeks, add Power Roots for accelerated rhizosphere development, and incorporate Pure Zym to stimulate microbial activity in the substrate. For higher-volume requirements, the 0.5L, 1L and 5L formats are available with the identical formulation.
Conclusion
Plagron Alga Grow 250 mL is the ideal intermediate format for the organic grower. Order today from Plant & Flower for fast delivery across Belgium.
Technical specifications
| Primary elements (% w/w) | |
|---|---|
| Total nitrogen (Ntot) | 4.2% |
| Organic bound nitrogen (Norg) | 3.3% |
| Ammonium nitrogen (NH₄-N) | 0.9% |
| Phosphorus pentoxide (P₂O₅) | 2.4% (water-soluble) |
| Potassium oxide (K₂O) | 4.3% (water-soluble) |
| Trace elements (% w/w) | |
| Boron (B) | 0.010% |
| Copper (Cu) | 0.002% |
| Iron (Fe) | 0.020% |
| Manganese (Mn) | 0.014% |
| Molybdenum (Mo) | 0.0005% |
| Zinc (Zn) | 0.006% |
| Physical and chemical properties | |
| Acidity (pH) | 5.5 |
| Conductivity (EC) | 29 mS/cm |
| Density | 1.26 g/mL |
| Form | Liquid |
| Colour | Dark brown |
| Odour | Molasses-specific |
| Foaming | None |
How much nutrient solution does Plagron Alga Grow 250 mL yield?
At the maximum dosage of 4 mL per litre of water, 250 mL of concentrate produces up to 62.5 litres of working nutrient solution. This is sufficient for three to five plants throughout a complete vegetative period, depending on container volume and watering frequency.
Does the 250 mL bottle offer better value than the 100 mL?
Yes. The 250 mL format delivers a lower cost per litre than the 100 mL bottle, providing 2.5 times the volume at a proportionally reduced price. For the best overall value per litre, the 1L or 5L formats remain the most economical options.
Can Alga Grow 250 mL be tank-mixed with other fertilisers?
Within the Plagron Natural programme, Alga Grow can be combined with other Plagron additives such as Power Roots or Pure Zym in the same nutrient tank. Avoid mixing with products from other manufacturers or with mineral-based fertilisers, as this may alter the formulation's efficacy and nutrient availability.
When should I switch from Alga Grow to Alga Bloom?
Transition to Alga Bloom once your plants display the first signs of flowering or when you shift the photoperiod to 12/12 hours for indoor cultivation. The changeover can be phased: during the first week of flowering, blend a half-dose of Alga Grow with a half-dose of Alga Bloom for a gradual nutritional transition.
