FerViForest – Regenerated plant amendment
How much stone do I need?
How much stone do I need for the ground?
For pebble and gravel:
• approximately 80kg per m², based on a 5cm layer.*For particle sizes >32mm, a thicker layer is required.
• Consumption per sack: 1000kg = 0.625m³.
• Coverage: approximately 12.5m² with a 5 cm layer.
For pine bark:
• approximately 70L per m², based on a 5cm layer.
• Consumption per sack: 1000L = approximately 1m³ = approximately 600kg
• Coverage: approximately 14m² with a 5 cm layer.
For volcanic, slate and chamotte:
• approximately 50kg per m², based on a 5cm layer.
• Consumption per sack: 1000kg = approximately 1m³
• Coverage: approximately 20m² with a 5 cm layer
How much stone do I need to fill a gabion?
Density of approximately 1,650kg per 1m³.
The calculation is very easy to understand with an example: if you have a gabion of 100x50x30 cm, you must do the following calculations:
1x0.5x0.3 = 0.15m³
0.15x1,650 = 247.50kg of stone.
*It is always a good idea to calculate an extra 5%, since when gabions are filled they expand a little and a little more stone always fits than in the theoretical calculations.
Clarifications
ATTENTION!
The grain sizes of GRAVELS AND pebbles are sieve sizes
The actual sizes may vary slightly, since when talking about, for example, 60-80mm stone, it means that the stones pass through an 80x80mm square mesh and do not pass through a 60x60mm one.
Through that 80x80 mesh, a stone 100mm long and 65mm wide can pass, so there may be a percentage of stones larger than 80 and smaller than 60mm.
Breakage of pebbles
On the other hand, in pebbles larger than 60mm, there is a percentage of up to 10% of stones that can break during sorting, washing, loading and unloading; to this day we do not have machinery that prevents such breakages.
In the photos you can see, only real products are shown; broken pieces have not been removed.
Dust and sand in the products
This product is not washed, so it contains dust, sand and even traces of other products due to processing and transport. This is not a problem when using it; the stone will wash itself over time or you can pour water on it before using it.
FerViForest – Regenerated plant amendment
FerViForest – Regenerated plant amendment
Available in:
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Big Bag of 1,000 liters
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Bag of 15 liters
🌿 Product description
FerViForest is a regenerated plant amendment of forest origin, obtained from the valorization of ashes and slags from non-hazardous biomass. It is a natural and sustainable product, designed to improve soil structure and fertility, providing essential minerals and promoting the biological balance of the land.
Ideal for regenerative agriculture, composting, recovery of degraded soils, and substrate mixtures
🧪 Average composition (may vary slightly by batch)
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Calcium (Ca): 12–20%
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Potassium (K₂O): 3–7%
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Phosphorus (P₂O₅): 1–3%
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Silicon (Si): 8–15%
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pH: 10–12 (acid correction effect)
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Residual organic matter: < 2%
🌾 Recommended uses
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Improvement of agricultural soils: increases aeration, structure, and water retention capacity.
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Composting: acts as a mineral input and pH regulator.
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Acidity correction: its alkaline nature helps recover acidic soils.
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Application in crops: garden, fruit trees, olive grove, vineyard, extensive crops, and regeneration of forest areas or pastures.
🌍 Environmental advantages
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Reduces carbon footprint.
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Replaces virgin materials, avoiding the extraction of aggregates.
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Recycled product and locally valorized.
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Contributes to circular and sustainable agriculture.
📦 Formats and presentation
| Format | Approximate yield | Ideal for |
|---|---|---|
| Bag 15 liters | 10–15 m² | Gardens, home use |
| Big Bag 1,000 L | 400–600 m² | Agricultural operations, nurseries, industrial composting |
🛠️ Mode of use
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Apply to the soil on the surface or buried superficially.
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Recommended dose: between 2 and 5 kg/m² depending on soil type and crop.
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For compost: add between 5–15% of the total volume.
⚠️ Precautions
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Alkaline product: use gloves during manual application.
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Do not apply directly to seedlings or roots without mixing first.
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Product not suitable for animal or human consumption.
❓ Is FerViForest biochar?
No, it is not. Although both come from plant biomass, FerViForest and biochar are distinct products, with different origins, properties, and uses.
🔍 Technical comparison: FerViForest vs Biochar
| Characteristic | FerViForest | Biochar |
|---|---|---|
| Origin | Slag and ash from biomass combustion | Charcoal obtained by pyrolysis |
| Obtaining process | Complete combustion with oxygen (thermal energy) | Pyrolysis (partial combustion without oxygen) |
| Carbon content | Very low (mainly mineral material) | Very high (stable and porous carbon) |
| Color and texture | Light gray, granular, sandy | Black, light, porous |
| pH | Alkaline (8.5) | Slightly alkaline or neutral (depends on origin) |
| Main use | Regenerative amendment, composting, structural improvement | Soil conditioner, nutrient and carbon fixer |
| Retention capacity | Improves soil structure and mineralization | Very high water and nutrient retention |
| Environmental benefit | Valorization of waste and reduction of CO₂ | Long-term carbon sequestration |
| Economic value | Accessible, large volume | High, technical and specialized |
🌿 So, what is FerViForest?
FerViForest is a regenerated plant amendment, rich in minerals such as calcium, potassium, and silicon, designed to:
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improve soils,
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stabilize composts,
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recover degraded lands,
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and correct soil acidity.
It is a complementary alternative to biochar, not a substitute. In fact, they can be combined to achieve more balanced soils: one provides structure and carbon, the other minerals and alkalinity.