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Copy link Overview of Wood Fiber and Plant Fiber Sources by Geographic Region
The botanical source and local processing technology influences the physical and chemical characteristics of wood and plant fiber. Knowing the oring of raw materials is essential for ornamental plant growers
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Wood Fibers and their Geographical Regions
Knowing the origin and species of raw materials is essential for substrate formulators/potting soil manufactures and ornamental plant growers because physical-chemical properties heavily depend on the geographical origin.
Parameters as pH, air-filled porosity, water-holding capacity, C:N ratio, and structural durability are influenced by the botanical source and local processing technology.
| Region | Primary Botanical Species | Processing Technology | Key Technical and Agronomic Features |
|---|---|---|---|
| North America | Loblolly pine (Pinus taeda) | Mechanical disc refiners, Hammer mills | High air-filled porosity, low initial EC; widely used in Pine Tree Substrate (PTS) formulations |
| Pinus eliotii (Slash pine) | |||
| Europe (mainstream) | Pinus sylvestris (Scots pine) | High-temperature twin-screw extrusion, Disc refiners | High air-filled porosity, low initial EC; widely used in Pine Tree Substrate (PTS) formulations. |
| Pinus pinaster (Maritime pine) | |||
| Picea abies (Norway spruce) | |||
| Europe (specialty and regional) | Castanea sativa (Detannized chestnut) | Industrial extraction by-products, Twin-screw extrusion | Sustainable circular economy solutions; require specific nitrogen management due to distinct C:N dynamics. |
| Miscanthus × giganteus (Giant miscanthus ) | |||
| Oceania and South America | Pinus radiata (Radiata pine) | Mechanical refiners, Extrusion | Derived from managed forestry plantations; provides a durable structural matrix and excellent aeration. |
Wood Fiber Origin: Key Takeaways for Growers and Substrate Manufacturers
Based on the evidences listed in the above table, here below the main learning points for potting soil manufacturers and horitcultural professional growers
Wood Fiber: Species Specificity
Softwood species (pines and spruces) remain the industry gold standard due to their high lignin content, lower phenolic activity, and predictable long-term physical stability.
Wood Fiber: Processing Impact
High-temperature extrusion effectively sanitizes raw fiber, lowers physical density, and increases air-filled porosity, making wood fiber an ideal aeration amendment in growing media. However, high temperatures can create a biological vacuum, leaving the substrate temporarily vulnerable to opportunistic pathogen recolonization if beneficial microflora are not properly managed or re-inoculated
Conclusions
Considered the wide number of variables, personalized guidance might be needed. Our regional technical support is available: visit your country’s website to find who’s the closest ICL’s expert to you or fill in the form available by clicking on the banner at the bottom of this page
Essential Bibliography
- Abad, M., et al. (2001). Bioresour. Technol., 77(2), 197–200.
- Barrett, G.E., et al. (2016). Sci. Hortic., 212, 220–234.
- Cattivello, C., Zaccheo, P. (2024). I substrati di coltivazione (2nd ed.) EdAgricole.
- Evans, M.R., et al. (1996). HortScience, 31(6), 965–967.
- Gruda, N.S. (2019). Agronomy, 9(6), 298.
- Handreck K., Black N. (4th edition 2010). Growing media for ornamental plants and turf. UNSW Press Book
- Maher, M.J., et al. (2008). In: Soilless Culture: Theory and Practice. Elsevier.
- Raviv, M., Lieth, J.H. (2019). Soilless Culture: Theory and Practice (2nd ed.). Academic Press.
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