ETT has a constantly expanding range of containerised trees in 45 litre to 1000 litre sizes. Containerised trees are available all year around and include deciduous, exotic evergreens, and a range of Australian Native trees.
Our growing methods are the result of extensive research into the ideal growing conditions for containerised trees. Trees are grown in genus-specific soil free potting medium, and are formatively pruned and shaped. Our containerised trees are grown to be self-supporting, and are not grown on a trellis system. We ensure that trees are never left too long in a container and are vigorously root pruned at every potting phase to meet the requirements of the Australian Tree Standard AS2303:2015 with particular attention to the criteria for Below Ground Assessment of Tree Stock.
ETT has conducted research into the benefits of different growing containers, and chooses to use poly woven bags with handles. This allows for greater ease of handling – both manually and by machine. We have also converted to a squatter design, which makes the trees more stable, but more importantly it is shaping roots to grow down and out as opposed to root systems in traditional pots, which are tapered and narrow at the bottom.
ETT describes its containerised trees by the height and caliper with reference to the size of the root ball volume in litres. It is important that the ratio between the above ground parts of the tree (height and caliper) and the root ball volume are in proportion. Australian Tree Standard AS2303:2015 provides a comprehensive ‘informative’ guide in regard to this relationship.
Smaller pots are often described by diameter size (cm, mm and inches). The table below helps approximate the volume for the many different pot size descriptions, making it easier to understand the relationship between the above ground parts of the tree and the root ball volume in accordance with the Standard.