I have had my 3 bonsais almost over a year now and its getting time to repot but I am completely lost. I pretty knowledgeble about my bonsai on daily care, fertilzation, pruning, wiring, and how to treat sickness but I have no idea how to repot or even what size pot i should get. I also keep my bonsai on a humidity tray and periodically i find rots growing out of their drainage holes; I usually cut them. Is this a sign that they need new pots and am i doing the right thing by cutting them?
PS- What they do to bonsai's in target and other big chain stores is wrong and is killing off millions of bonsais. I would never ever buy a bonsai from any big chain. I was once given one from my friend which she bought from target for my to take care of because she thought it was dieing, I couldn't understand how it lived longer then a week with ricks glued over it.