In the bonsaitonight article ‘Why are my trees yellow’ the first picture shows two pines. The pots they’re in looks like something kind of airpruning pots and I would like to know where I can get some?
I think your referring to the plastic colander that some of us use and also pond pots/baskets. You can find the colander at places like dollars store (or the Chinese market) and pond baskets at aquatic nurseries. Other places have them as well but then you ask yourself Quality vs. Quantity.
Colanders for pine taining?