Why We Grow in Coco Fibre Pots
Growing Container Trees with Longevity & Reducing Plastic
Trees that grow in containers need special treatment to ensure that they will have longevity through to their final install. Still persisting in the industry, deciduous trees are planted in black plastic pots. If the plastic pots don’t have gaps in the sides to allow the roots to catch and stop their growth, (root prune), the roots will go around the pot. This tendency is known as root circling or girdling roots and it’s been a long-term problem in the cultivation of trees in containers.
Girdling roots will cause the tree to have a diminishing level of nutrient transport through the root system as the girdling tightens. Over time the movement of water and necessary foods for the plant is totally cut off and will cause the death of the tree. Once a tree has begun its growth in the container, the root growth that has begun in that container will persist into the next stage of its movement. So, a root that begins to circle in the container will continue the pattern even when the tree is planted in an open soil system and the roots have room to expand. Roots are not only involved in the nutrient transport of the tree but also are essential for the anchoring of the tree. The spreading and deepening root allows the tree to weather the storms that will ultimately come. There really is no good way to grow a tree in a pot without root pruning. The danger is always present that the roots would set up a dangerous pattern of growth.
AVK Nursery has been working to make their trees grow with true longevity by growing in root pruning pots. Initially black plastic pots were trialed that had breaks in the medium of the pot that would cause the roots to be naturally pruned by the air. Ultimately, AVK Nursery has decided to utilize a medium that was in good supply but also had the properties that would work to root prune trees. That substance is coconut fiber which is also known as coir. It’s an abundant material that is a by-product of the coconut tree production in the far east. Global production of coconuts was at 62 million tons in 2022. Horticulturally coco fiber is excellent because it is a nutrient neutral material, but it also has good moisture retention. An added benefit of coir is that it has natural anti-fungal properties.
Now, most of AVK Nurseries trees are grown in Coco fiber pots that have been molded into horticultural pot shapes. They are fuzzy. It almost looks like fur, but the roots they produce are spectacular! The tree roots can emerge as they wish and as they grow out in the pot, they reach the fiber and stop. Then they start other roots to move out into the medium of the pot. They reach the edge and stop. This creates a pot full of roots that are ready to move out into the new soil when the tree is installed. This is a revolution in cultivation of container trees, and the output is a product that has true longevity and fantastic ability to be transplanted with minimum disruption of the roots and minimum time to plant.
Another outstanding property of coir pots in nursery production is that plastic pots are not being used. Tons of plastic will be diverted from landfills. This is a true environmental protective achievement.
AVK Nursery purposes towards the best environmental stewardship that we can attain through technology and innovation. Both in production and pest management.
