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Metrop GreenXtrem ( RhizoXtrem ) 0.25l
Metrop GreenXtrem 250ml delivers the full performance profile of this seaweed-based biostimulant in a compact, trial-friendly format. Derived from Atlantic Laminaria digitata, GreenXtrem combines root stimulation, immune activation and antiseptic activity in a single ultra-concentrated formula certified NF U 42-004. NPK 0.3-0.03-0.4 with 0.4% laminarin and 0.7% mannitol — active compounds that drive root hair development and cell resilience from week one. At 0.3 ml/L, 250ml yields 830 litres of nutrient solution. Compatible with soil, coco and all hydroponic setups, no pH adjustment required. Test GreenXtrem in your grow — available now at Plant and Flower.
Metrop GreenXtrem 250ml – Seaweed Biostimulant for Root Development and Plant Resilience
The successor to RhizoXtrem, Metrop GreenXtrem is a high-concentrate liquid extract of Atlantic Laminaria digitata seaweed, engineered to deliver measurable gains in root mass, nutrient uptake efficiency and stress tolerance. The 250ml format is the logical entry point: sufficient for 830 litres of nutrient solution at the standard dose, it allows full evaluation of the product's performance across one or more complete grow cycles. Explore the complete Metrop range at Plant and Flower.
Active Compounds and Mechanism of Action
GreenXtrem's performance stems from its bio-active fraction rather than its base NPK of 0.3-0.03-0.4:
- Natural phytohormones (auxin, cytokinin): directly regulate cell elongation and lateral root initiation, accelerating fine root hair development within days of first application.
- Laminarin 0.4%: a β-glucan elicitor that triggers the plant's systemic acquired resistance, improving tolerance to pathogen pressure and environmental stress.
- Mannitol 0.7%: a sugar alcohol that enhances membrane permeability and nutrient transport efficiency at the root–soil interface.
- Antiseptic activity: suppresses bacterial and fungal colonisation in the root zone without disrupting beneficial microbial populations.
Application Protocol
Apply GreenXtrem from the emergence of first true leaves through to the onset of the bloom phase. Dose at 0.3 ml per litre of nutrient solution. Alternating one GreenXtrem feed with one plain water feed is an established practice among experienced growers — it maintains hormonal stimulation while eliminating any overdose risk. The product integrates seamlessly with Metrop MR1 during vegetative growth and does not require pH adjustment across soil, coco or hydroponic media.
250ml Format: Performance per Millilitre
At 0.3 ml/L, the 250ml bottle produces 830 litres of prepared nutrient solution — a figure that puts GreenXtrem among the most cost-efficient root stimulants per application in its category. For growers running small to mid-size setups, this format covers multiple full cycles before requiring replacement. Once product performance is confirmed, scaling to the 1L format reduces per-litre cost significantly. Combine with AminoXtrem from week 4 of the cycle for a complete Metrop additive programme.
Order Metrop GreenXtrem 250ml from Plant and Flower — fast shipping across Belgium. The data-driven choice for growers who want measurable root performance from day one.
How many litres of nutrient solution does GreenXtrem 250ml produce?
At the recommended dose of 0.3 ml per litre, a 250ml bottle yields up to 830 litres of prepared nutrient solution. For a small grow tent or cabinet, this typically covers two to three full cycles depending on plant count and watering frequency.
Is GreenXtrem 250ml compatible with base nutrients from other brands?
Yes. GreenXtrem is fully compatible with base fertilisers from all major brands. Its organic plant-based composition does not interact negatively with mineral nutrient solutions. For optimal results, Metrop recommends pairing it with MR1 during vegetative growth, but off-brand combinations perform well in practice.
Can GreenXtrem 250ml be used in recirculating hydroponic systems?
GreenXtrem can be used in recirculating systems, but growers should monitor organic matter accumulation in the reservoir and refresh the solution regularly. In DWC and NFT setups, applying every second watering rather than continuously is the recommended approach to avoid unwanted pH drift from organic build-up.
When should I transition from GreenXtrem to AminoXtrem in the Metrop schedule?
GreenXtrem runs from first true leaves through to the start of the bloom phase. AminoXtrem begins at week 4 of the cycle and continues through the final flush week. The two products overlap briefly in the standard Metrop additive schedule, providing a smooth handover from root-building to flowering support.
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