I transplanted some of my cymbidiums immediately after they arrived, and I left others in their original pots, assuming that they still had enough space.
Now it was time to transplant the remaining plants.
I collected rotten spruce branches from the middle of huge tree trunks, mixed them with plant foam glass in a 3:1 ratio of wood to glass, and added about a tablespoon of Aminosil granules per pot.
The most challenging part was removing the orchid from its old pot. I couldn't save the pots intact.
I got the wood for the cymbidiums from the forest, the foam glass from any marketplace, and the Aminosil from the official store on Wildberries.