Metrop Fertilizers: Ultra-Concentrated Nutrition for Your Indoor Crops

Metrop fertilizers are revolutionizing plant nutrition with their ultra-concentrated formulas that completely change the game in indoor cultivation. This Dutch brand has developed liquid nutrients up to 5 times more concentrated than conventional fertilizers, drastically reducing long-term costs while optimizing nutrient assimilation.

Why choose Metrop fertilizers for your grow

The exceptional concentration of Metrop fertilizers is their main asset: where you would use 5ml of a classic fertilizer, 1ml of Metrop is enough. This approach changes everything in terms of economy and storage. The MR1 and MR2 formulas cover the entire growth cycle with remarkable precision. MR1 boosts vegetative growth with an optimized NPK ratio for root and foliar development, while MR2 supports flowering by prioritizing phosphorus and potassium.

Another strong point is pH stability. Metrop fertilizers naturally maintain a pH between 5.8 and 6.2, which avoids constant corrections and fluctuations that stress plants. In hydroponics, this is a huge time-saver.

How to choose your Metrop range

The choice is mainly based on your growth phase and your system. For growth, MR1 is used at 0.5-1ml/L depending on the week of vegetation. During flowering, switch to MR2 with a dosage that gradually increases up to 1.5ml/L at the end of the cycle. The beauty of the Metrop system is its simplicity: no need to juggle with 10 different bottles.

For beginners, starting with the MR1+MR2 pack covers a complete cycle. Experienced growers can supplement with specific Metrop additives like CalMag or root stimulators, but frankly, the basic MR1/MR2 are already enough to achieve impressive results.

Frequently Asked Questions

What is the difference between MR1 and MR2 and which one should I choose for my growth phase?

MR1 is formulated for the vegetative phase with an NPK ratio rich in nitrogen (around 7-3-6) that promotes stem and foliage development. MR2 takes over during flowering with less nitrogen and more phosphorus-potassium (4-5-7) to stimulate flower formation. You should use MR1 throughout growth until the photoperiod change, then switch to MR2 at the first signs of flowering. This transition is done gradually over 7-10 days to avoid any nutritional stress.

How to correctly dose Metrop fertilizers to avoid over-fertilization?

Always start with 0.5ml/L and gradually increase according to your plants' reaction. During growth, never exceed 1ml/L of MR1, and during flowering, gradually increase up to a maximum of 1.5ml/L of MR2. The EC of your solution should not exceed 1.8 in hydroponics and 2.0 in soil. Monitor the leaves: if they become dark green or the tips yellow, immediately reduce the dosage. Metrop's high concentration makes overdosing riskier than with conventional fertilizers.

Are Metrop fertilizers really more economical than other brands despite their price?

Absolutely, the calculation is simple: one liter of MR1 or MR2 is equivalent to 5 liters of classic fertilizer thanks to the concentration. Over a complete grow, you use approximately 50-80ml of Metrop versus 250-400ml of standard fertilizer. The price per liter seems high, but the cost per grow becomes very advantageous. A 250ml bottle of Metrop can feed 15-20 plants over a complete cycle, where several liters of traditional fertilizers would be needed for the same result.

Can I use Metrop fertilizers in soil, hydroponics, and coco fiber cultivation?

Yes, Metrop fertilizers adapt to all substrates without modifying the basic dosage. In soil, nutrient retention allows for less frequent fertilized waterings. In hydroponics, pH stability and the absence of residues prevent system blockages. In coco, rapid assimilation perfectly compensates for the substrate's inertia. Only precaution: in very rich soil, reduce the initial dosage to 0.3ml/L to avoid nutritional overload, especially if your potting soil already contains slow-release fertilizers.

What are the advantages of the high concentration of Metrop fertilizers compared to classic fertilizers?

High concentration offers several concrete advantages: reduced storage (one bottle replaces 5 bottles), easier transport, precise dosing to the nearest milliliter, and above all, optimized assimilation. Concentrated nutrients penetrate roots better because they require less transport water. This also reduces the risk of excessive dilution that weakens nutritional effectiveness. In indoor cultivation where every centimeter counts, being able to store 5 times less product while maintaining the same efficiency represents a huge advantage for organizing the growing space.