Professional products Sowing and pressed plugs Press RK-W + Perlite
Professional Press RK-W substrate with perlite for increased oxygenation of the seedling root zone.
Press RK-W + Perlite is the Arber professional substrate for seeding in containers and pressed plugs, with rapid drying between irrigation cycles thanks to integrated perlite.
Reply within 1 working day from your local area agent.
Features
Press RK-W + Perlite combines Baltic blonde peat 0–7 mm, brown peat 0–7 mm and perlite in a fine structure developed for plug cohesion and rapid drying between irrigations. The perlite increases air porosity in the mix and maintains stable oxygenation at the root zone even after frequent irrigation cycles, reducing the risk of asphyxiation in high-density trays.
Integrated dolomitic lime corrects the naturally acidic pH of peat to the optimal range of 5–6. The PG Mix starter fertiliser supports the first growth phase. Press RK-W + Perlite is the recommended variant of Press RK-W when your growing plan includes frequent irrigation or use in high-density trays.
Selected peat from the Baltic countries, consistently from the same fields, to ensure quality continuity batch after batch.
Technical specifications
| Structure | Fine |
|---|---|
| Granulometry | 0-7 mm |
| pH | 5–6 |
| EC | 0.6–1 mS/cm |
| Dry bulk density | 143–175 g/L |
Why choose it
- Fine granulometry 0–7 mm: uniform seed-to-substrate contact in plugs and containers.
- Integrated perlite: increases air porosity and accelerates drying compared to standard Press RK-W.
- pH 5–6 and EC 0.6–1 mS/cm: slightly acidic profile, stabilised in the formula.
- Dry bulk density 143–175 g/L: lightweight substrate for fast tray filling.
- PG Mix starter fertiliser and root biostimulant: promotes rooting of the germinating seedling.
Composition
- blonde peat 0–7 mm
- brown peat 0–7 mm
- perlite
Illustrative proportions of structural components.
Additional components
- root activator
- wetting agent
- pH corrector
Fertilisation
Base fertilisation
Available pack sizes
| Format | Units / pallet |
|---|---|
 70 L | 42 |
 250 L | 18 |
 Big Bale | 1 |
Substrates for vegetable seedling growers
View all Arber substrates for this crop type, with selection criteria and technical comparison.
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