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Metrop MR2 250 ml
Metrop MR2 250 ml is a highly concentrated bloom fertiliser with an NPK of 10-20-40, engineered to maximise yield during the flowering phase. The exceptionally high potassium content drives sugar transport to the flowers, producing denser, heavier buds with improved flavour profiles. At 0.75 to 1 ml per litre, this 250 ml bottle yields up to 333 litres of nutrient solution — an efficient entry point for growers testing the Metrop system or running compact setups. Works on all substrates and irrigation systems. Fast delivery from your Belgian grow shop.
Metrop MR2 250 ml – High-Potassium Bloom Fertiliser NPK 10-20-40
Flowering is where inputs become outcomes. The nutrients available during this phase directly determine bud weight, density, and terpene production. Metrop MR2 addresses each of these variables with a 10-20-40 NPK ratio that prioritises potassium — the element responsible for photoassimilate transport from leaves to flowers. View the complete Metrop range at Plant and Flower.
Why Potassium Dominance Matters
Potassium regulates over 60 enzymatic processes in plants. During bloom, its primary function shifts to sugar and amino acid translocation toward reproductive sites. Higher potassium availability at this stage correlates with:
- Increased dry weight: more efficient carbohydrate storage in floral tissue.
- Enhanced aromatic profile: chelated trace elements in MR2 support terpene and flavonoid biosynthesis.
- Improved osmotic regulation: potassium helps plants manage water stress during heavy flowering.
- Stable EC: no drift after mixing, no precipitation in reservoirs or drip systems.
Transition Protocol: MR1 to MR2
Run Metrop MR1 through the vegetative phase and the first 2–3 weeks of bloom (stretch period). Once flower sites are clearly established — typically week 3 or 4 — switch to MR2. Ramp dosage gradually from 0.75 to 1 ml/L as buds develop. In nutrient-rich soil, apply 1–3 times weekly; in hydro or coco, dose daily. An optional flush with plain water during the final week is common practice.
250 ml: Trial Size, Full Performance
This bottle produces 250–333 litres of feed solution. Practical for single-tent grows, first-time Metrop users, or supplementing an existing bloom programme. Pair with Metrop Calgreen 250 ml for calcium reinforcement and Metrop AminoXtrem 250 ml for amino acid-driven flower stimulation.
Order Metrop MR2 250 ml from Plant and Flower — fast shipping across Belgium. Give your bloom phase the fuel it needs.
What is the difference between Metrop MR1 and MR2?
MR1 (NPK 10-40-20) is the growth-phase fertiliser with high phosphorus for root development. MR2 (NPK 10-20-40) is the bloom-phase fertiliser with high potassium for flower weight and density. Together they form a complete two-part base programme covering the entire cultivation cycle.
Can Metrop MR2 be used as a foliar feed during flowering?
MR2 can be applied as a foliar spray during bloom using a diluted solution, sprayed outside of peak light hours. Avoid spraying directly on developed flowers to prevent burn or moisture-related issues. For root-zone feeding, maintain the standard 0.75–1 ml/L dosage.
How many litres of feed does 250 ml of Metrop MR2 produce?
At the minimum dosage of 0.75 ml/L, a 250 ml bottle produces approximately 333 litres of nutrient solution. At 1 ml/L, it yields 250 litres. For larger operations, the 1 litre format offers better cost efficiency per feed cycle.
Should I flush at the end of the bloom cycle when using Metrop MR2?
Flushing during the final week is optional and depends on substrate type and grower preference. MR2 contains no harmful dyes or impurities, making residue accumulation less of a concern than with conventional fertilisers. Many growers run plain water for the last 5–7 days as standard practice.
