- You cannot place a new order from your country (United States).
search
close
Metrop MR2 1 l
Metrop MR2 1 litre is the professional-grade bloom fertiliser with NPK 10-20-40 for growers who demand maximum yield. This single bottle produces up to 1,333 litres of nutrient solution, delivering unmatched cost efficiency for multi-cycle operations. The high potassium ratio drives sugar translocation to flowering sites, resulting in heavier, denser buds with superior flavour and aroma. Combined with MR1 for the growth phase, you have a complete base programme requiring no additional supplements. No dyes, no filler — pharmaceutical-grade concentration. Fast shipping from Belgium.
Metrop MR2 1 Litre – Professional Bloom Fertiliser for Maximum Yield
In commercial cultivation, the cost per gram of dried flower is the metric that matters. Metrop MR2 1L optimises this ratio through a NPK 10-20-40 formulation that delivers more potassium per millilitre than any competing product at this concentration. One bottle, up to 1,333 litres of feed solution, zero compromise on raw material quality. Explore all professional plant nutrients at Plant and Flower.
Potassium Loading: The Data
Potassium (K) at a ratio of 40 places MR2 among the highest-potassium bloom fertilisers available. The physiological impact during flowering is measurable:
- Sugar translocation efficiency: K activates the phloem loading mechanism that moves photosynthates to reproductive tissue.
- Dry matter accumulation: higher K availability during weeks 4–8 of bloom directly correlates with increased bud dry weight.
- Terpene precursor support: chelated trace elements provide cofactors for the MEP and MVA pathways responsible for terpene biosynthesis.
- System compatibility: zero precipitation, stable EC in all recirculating systems including NFT, DWC, and ebb-and-flow.
Feed Schedule Integration
Transition from Metrop MR1 1L to MR2 at week 3–4 of the bloom cycle, once stretch has concluded and flower formation is established. Dose at 0.75–1 ml per litre, ramping upward as bud mass increases. Apply 1–3 times weekly on rich substrates; daily on inert media or hydroponic systems. Optional plain-water flush during the final week.
Scaling Economics
At 0.75 ml/L, one litre of MR2 produces 1,333 litres of feed. At 1 ml/L, it delivers 1,000 litres. For facilities running continuous or staggered cycles, the per-litre cost advantage over the 250 ml format is substantial. Complete the programme with Metrop Calgreen 1L for calcium and Metrop AminoXtrem 1L for amino-driven bloom stimulation.
Compatibility and Storage
MR2 is compatible with all Metrop products. When mixing with calcium-based supplements, maintain solution pH below 6.5 to prevent precipitation. Store in a dark, frost-free location between 5–40 °C. The product contains no water filler and does not expire. Shake thoroughly before each use — crystallisation is normal in highly concentrated formulas. Biodegradable and free from harmful dyes.
Order Metrop MR2 1L from Plant and Flower — fast Belgian shipping, competitive pricing, and professional grow support.
What EC should I target when using Metrop MR2 1L in hydroponics?
Due to MR2's high concentration, maintain a low EC and increase dosage gradually. Start at 0.75 ml/L and measure EC after mixing. The formula keeps EC stable once prepared, with no drift in recirculating systems. Exact EC targets vary by strain and growth stage — monitor plant response and adjust accordingly.
Can I mix Metrop MR2 with calcium supplements?
MR2 is compatible with Metrop Calgreen and other calcium products, provided the mixing water pH does not exceed 6.5. Above this threshold, calcium may precipitate out of solution. Always check pH after adding each component and adjust before feeding.
How does Metrop MR2 compare to PK boosters from other brands?
Unlike standalone PK boosters, MR2 is a complete bloom base fertiliser containing all macro and micro nutrients required for flowering — not just phosphorus and potassium. Its 5–10x concentration means less product per litre of feed, lower transport costs, and reduced plastic waste. No additional bloom base is needed alongside MR2.
How many litres of feed solution does Metrop MR2 1 litre produce?
At the recommended dosage of 0.75 ml/L, one litre produces approximately 1,333 litres of nutrient solution. At the maximum dosage of 1 ml/L, it yields 1,000 litres. This concentration makes the 1L format the most cost-effective choice for regular or large-scale cultivation.
