Professional products Repotting substrates Unipot Maxi
Professional repotting substrate for large containers with medium-to-long crop cycles.
Unipot Maxi combines Baltic blonde peat 20–40 mm and brown peat with wood fiber for pots Ø 16 cm and above: consistent drainage and structural stability across medium-to-long crop cycles.
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Features
Unipot Maxi is the Arber professional substrate for repotting plants into large containers intended for medium-to-long growing cycles. The medium-coarse structure combines Baltic blonde peat 20–40 mm and brown peat 0–20 mm. A small fraction of wood fiber adds long-term stability and resistance to compaction.
The 20–40 mm particle size of the blonde peat is the structural backbone of the mix. It keeps air porosity intact after many months of irrigation, maintains consistent drainage, and preserves gas exchange. The PG Mix starter fertiliser supports the re-establishment phase after repotting. The wetting agent helps rehydrate the root zone during the first watering cycle.
Unipot Maxi is designed for pots from Ø 16 cm upward, where both volume and structural integrity are required for cycles that can exceed 6 months on the bench. The blonde peat comes from selected Baltic origins, consistently from the same fields, to ensure batch-to-batch quality.
Technical specifications
| Structure | Medium-Coarse |
|---|---|
| Granulometry | from 0-20 to 20-40 mm |
| pH | 5–6 |
| EC | 0.6–1 mS/cm |
| Dry bulk density | 118–144 g/L |
| Recommended pot | Ø from 16 cm up |
Why choose it
- Medium-coarse structure: drainage suited to large containers with medium-to-long crop cycles.
- Dominant blonde peat 20–40 mm: maintains air porosity after 6+ months, suited to ornamental plants in pots Ø 16 cm and above with long crop cycles.
- Brown and black peat for moisture retention: the container does not dry out prematurely.
- pH 5–6 and EC 0.6–1 mS/cm: stable chemical profile for azaleas, camellias, hydrangeas, rhododendrons, and acid-loving plants.
- Integrated starter fertilisation: plants are ready for transplanting into the final container.
Composition
- blonde peat 20–40 mm
- brown peat 0–20 mm
- wood fiber
Illustrative proportions of structural components.
Additional components
- root activator
- wetting agent
Fertilisation
Base fertilisation
Available pack sizes
| Format | Units / pallet |
|---|---|
 70 L | 42 |
 250 L | 18 |
 Big Bale | 1 |
Substrates for potted plant growers
View all Arber substrates for this crop type, with selection criteria and technical comparison.
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