Using Colanders For Double Air-layering On Same Trunk

While this video shows how to make several bonsai from a nursery tree, what caught my eye was the double air-layering technique & the use of air pruning containers /colanders for air-layering. 

Tribu Bonsai, Spain

Watch on YouTube

Air pruning containers like this give superior root structure and density compared to that obtained using just a plastic wrap or a regular, smooth-walled nursery pot. 

My own experience with double air layering :

Double Air Layering - Ficus Racemosa / Cluster Fig Tree

Double Air Layering - White Lead Tree

For those who feel that air pruning is no big deal & that just about any container will do, I recommend watching this YouTube playlist & upgrading your knowledge : 

How Pot Design Affects Your Plant's Growth

and also read on this blog  :

How Pot Design Affects Your Air-layered Cuttings