Metrop

The Metrop range at Plant & Flower

Where most nutrient brands recommend 3 to 5 millilitres per litre of water, Metrop achieves the same results with 1 to 2.5. This Dutch manufacturer from IJsselstein produces highly concentrated liquid plant nutrients developed through bi-weekly plant sap analysis (S.A.P.). At Plant & Flower, your Belgian grow shop since 2011, you'll find the full Metrop catalogue with dedicated lines for soil, coco and hydro — a compact nutrient shelf where every bottle serves a specific purpose and nothing is redundant. Pair with the right substrates for optimal results.

Metrop philosophy: sap analysis and maximum concentration

Metrop takes a different approach to fertilizer development than most brands. Every 2 weeks during growth and bloom cycles, the company analyses plant sap to determine exactly which nutrients the plant needs at each stage. This data drives the NPK ratios and trace element composition of every product. Because Metrop uses different raw materials than conventional nutrient manufacturers, they achieve higher NPK differentials within a single formula, resulting in stronger vegetative growth, denser flowers and a more pronounced flavour profile. The practical benefits of high concentration are straightforward: less storage space, less packaging waste and lower shipping costs per grow cycle.

The core line: MR1, MR2 and Calgreen

Three products form the foundation of every Metrop feeding schedule. Metrop MR1 1 L is the growth nutrient, with an NPK ratio engineered for sturdy stems, tight internodal spacing and dense foliage. Metrop MR2 1 L takes over during bloom, delivering elevated phosphorus and potassium for heavy, compact flowers. Calgreen 1 L supplements both phases as a calcium, magnesium and nitrate nitrogen source that prevents deficiencies and strengthens cell structure. One feeding schedule covers soil, coco and hydro — only the dosage changes slightly between substrates.

Metrop stimulators and additives

Metrop MAM 1 L targets mother plants and cuttings with a formula that promotes rapid root development and vigorous foliage. AminoXtrem 1 L is an amino acid-based biostimulant that intensifies flowering while improving taste and aroma in the final harvest — unlike a standard PK booster, it acts directly on the plant's metabolic processes rather than simply supplying extra phosphorus and potassium. RhizoXtrem 1 L promotes root system development through beneficial micro-organisms and enzymes that protect the root zone. Growers looking for maximum impact can opt for the GreenXtrem + RhizoXtrem pack 1 L, combining foliar and root stimulation in a single application. All products are also available in 250 ml format, ideal for trialling the range.

Foliar feeding, dosing and parameters

Most nutrient brands treat foliar feeding as a supplement. Metrop considers it the most effective method of plant nutrition. The majority of the range is suitable for foliar application, allowing nutrients to be absorbed directly through the leaves. This bypasses substrate limitations, delivers faster results than root uptake, and provides precise control when addressing specific deficiencies or dealing with challenging root zone conditions. Apply foliar sprays early or late in the day when leaf stomata are open, using a lower dosage than for root feeding, sprayed evenly on both upper and lower leaf surfaces.

Metrop cultivation parameters

• Root feeding: 1-2.5 ml/L (vs 3-5 ml/L for standard brands)
• Foliar spray: roughly half the root feeding dosage
• Target EC: measure after mixing per your feeding schedule
• Target pH: 5.5-6.5 depending on substrate
• Solution temperature: 18-22 °C for optimal uptake
• Foliar timing: early or late in the day, stomata open

A reliable pH/EC meter is essential with this concentrated range — dosage accuracy is what separates excellent results from mild over-fertilisation.

FAQ - Frequently asked questions about Metrop

Browse the full Metrop range and experience the difference that concentrated nutrition makes. Order at Plant & Flower for fast, discreet delivery anywhere in Belgium.