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Plagron Royal-Mix 50 l
Sending a bag is €12.95 (Belgium) per bag, register on the site to see the shipping costs. Plagron Royal-Mix 50 l is Plagron's flagship substrate — 100% organic, Control Union certified, pre-fertilised for 6 weeks with time-released organic nutrients (NPK 5.5-11-5.5 at 10.5 kg/m³). pH 6.0–7.2, EC 1.3–2.0 mS/cm. The finest selected peat, perlite, exclusive Plagron worm castings and a precision-balanced organic fertiliser blend that releases exactly when the plant needs it. The substrate of Belgian growers who target the highest yield with an exceptional natural flavour profile.
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Plagron Royal-Mix 50 l — The Organic Premium Substrate Engineered for Maximum Yield
When cultivation is driven by the pursuit of maximum yield without compromising organic principles, the substrate has to perform at the highest level. Plagron Royal-Mix 50 l is Plagron's definitive answer — the most advanced organic substrate in their range, built around a unique time-released organic nutrient system that feeds the plant exactly when it signals the need, not a moment before. Control Union certified and fully compliant with EC Regulation 834/2007 for organic agriculture. Find it alongside our premium Plagron organic substrate range and choose the right match for your grow style.
Time-Release Nutrition: The Core Innovation of Royal-Mix
What fundamentally sets Royal-Mix apart from other organic substrates is its fertiliser mechanism. Rather than releasing nutrients in an immediate surge — causing EC spikes and potential over-fertilisation — Royal-Mix organic fertilisers are triggered by soil temperature, moisture levels and root activity. The plant itself dictates the release rate. This eliminates guesswork, prevents nutrient burn, and ensures that every gram of pre-fertilisation is used productively over a minimum of six full weeks.
- 6-week organic pre-fertilisation (NPK 5.5-11-5.5): complete nutritional coverage for the first six weeks — zero supplemental feeding required.
- Time-released organic nutrients: released on plant demand, never in excess — no EC spikes, no waste.
- Exclusive Plagron worm castings: rich microbial soil life, improved water retention and vigorous natural growth.
- Integrated perlite: lightweight, airy structure with optimal root-zone oxygen levels from day one.
- Control Union certified: independently verified 100% organic composition — safe, sustainable, accountable.
How to Use Plagron Royal-Mix 50 l
Royal-Mix is ready to use for potting and repotting all flowering plants. For young plants or freshly rooted cuttings not yet accustomed to high EC levels, pre-flush with 5–10 litres of water per 10-litre pot before transplanting. This removes the immediately soluble nutrients, allowing the plant to establish without stress. EC will rise again progressively over the following days as the time-release fertilisers activate. Begin supplemental feeding from week 4 with Plagron Alga Grow in the vegetative phase and Plagron Alga Bloom during flowering — organic nutrients take approximately two weeks to become available, meaning they'll be active in week 6 exactly as the pre-fertilisation runs out.
Royal-Mix in Context: Choosing the Right Plagron Substrate
Royal-Mix is the organic flagship for yield-focused growers who want the substrate to carry maximum nutritional intelligence. Compared to Grow-Mix (three-week mineral pre-fertilisation with full grower control from week three), Royal-Mix delivers six weeks of organic time-release with significantly less manual intervention required. Both share the same peat quality and perlite structure — the decision comes down to your preferred nutritional philosophy and level of hands-on feeding involvement. For growers following the Plagron 100% Natural Grow Schedule, Royal-Mix is the natural starting point.
Order Plagron Royal-Mix 50 l today and benefit from fast delivery across Belgium. The flagship substrate for Belgian organic growers who demand the highest yield alongside an exceptional, fully natural flavour profile.
Does Plagron Royal-Mix 50 l need to be flushed before use?
For well-established plants, direct potting is fine. For young plants or freshly rooted cuttings not yet used to high EC environments, flush first with 5–10 litres of water per 10-litre pot to remove immediately soluble nutrients. The plant can be transplanted directly after. EC will rise again progressively over the following days as the time-release organic fertilisers gradually activate — without any risk of nutrient burn at transplant.
When should I start feeding with Plagron Royal-Mix 50 l?
Start supplemental feeding from week 4 using Alga Grow or Alga Bloom depending on growth phase. Organic nutrients require approximately two weeks to become plant-available. By starting in week four, your supplemental nutrition will be active in week six — precisely when the Royal-Mix pre-fertilisation runs out. This creates a seamless nutritional transition with no gap or deficiency.
What is the difference between Plagron Royal-Mix and Plagron Bat-Mix?
Both are 100% organic, CU-certified and pre-fertilised for six weeks with the same EC range. Royal-Mix uses a broad blend of time-released organic fertilisers designed to maximise yield and deliver a natural flavour profile. Bat-Mix relies primarily on bat guano as its main nutrient source — naturally high in phosphorus and potassium — and is particularly renowned for intensifying flowering and harvest aroma. Choose Royal-Mix for yield and organic nutritional intelligence; choose Bat-Mix for explosive bloom development and superior aromatic quality.
What are the pH and EC values of Plagron Royal-Mix 50 l?
Plagron Royal-Mix has a pH between 6.0 and 7.2 (1:1.5) and an EC between 1.3 and 2.0 mS/cm (1:1.5). These values reflect its maximum pre-fertilisation with 10.5 kg/m³ of organic NPK 5.5-11-5.5. For young or sensitive plants, a pre-flush before transplanting is recommended to prevent nutrient overload at the critical establishment phase.
