Gotcha thanks for that information I was looking for so I’ll gather one in fall and then one in winter but like you said keep the entire root ball and plant in a big container for one year and if I’m correct after one year I can reduce the roots to put it into a bonsai container? Thanks
It depends on the tree. Most of the time you can not go from a large collection container straight to a bonsai pot....
It is usually best to let the tree recover and that could take a few years. You need to learn to monitor the tree and evaluate its health and when it is ready for the next step. It usually takes me 3 repottings with 2 to 3 years between each repotting to go from a large nursery container to a bonsai shaped training pot which is still larger than what the tree's eventual bonsai pot will be. It stays in that training pot until the branch development is largely finished then it goes into its "finished" bonsai pot which could also take several years.
Why to we wait 2 to 3 years between repotting on most trees? Because repotting and cutting the roots is a major insult to the health of the tree. We need to let the tree recover before doing any more major work to that tree. The general guidance is one major insult per year. The tree also needs to have the chance to regrow new roots after you cut some off. That will take a couple of years. The year or two between repotting, we work on the branches.
The only tree I repot every year is one of my trident maples because it is capable of regrowing a foot of roots every year. But that's it, one tree out of 50 that I own.
I am a little concerned that you seem to only want quick or instant bonsai. Instant bonsai are pretty much a myth. Bonsai take years to develop. I have trees that I have had in training pots for years because they are still under development. The extra room the training pot allows for that development better than confining the roots to an even smaller container.
If you want an instant bonsai, save up your money and buy a finished tree for a few thousand dollars or more.. That is how you get instant bonsai, by paying someone else for their time to develop the tree.
If you are too impatient and only want instant gratification, bonsai is not an activity you will enjoy.