I wasn't necessarily wanting to repot regularly... I suppose I phrased my post poorly... Sea hibiscus is known to have extremely fast growing roots often requiring an up pot or regular root maintenance.
I understand that it is the fastest of the fast developing trees, and nothing deciduous would truly compare on anywhere near the same scale. However I love deciduous and tropics don't stand a chance here with my ridiculously low humidity semi extreme Temperatures swinging from extreme heat to low colds (and going from freezing to thawing in winter regularly)
Id love a sea hibiscus because of its roots growth particularly, I want to experiment with roots more but I'm not aware of any plants that recover roots at a rate for me to learn anything to apply to my slower growing trees.
It would be a waste to use a nice tree for stupid experimental things and have it look aweful for it rather then have something like a sea hibiscus which would be able to recover from your absurd ideas semi easily.
I suppose I'm looking for a fast growing tree that can be un-suited for bonsai traditionally to practice techniques and develop strange and unique methods for...
You might be looking for varieties of Elm.
Vigorous buggers and hardy too.
Thank you for the suggestion! Very helpful. They do grow all over around here so in fall I'll dig one of the ones my neighbors regularly try to eliminate (should have something interesting after years of being cut down lol) and see how it does.
Elm are vigorous and tough for sure but you won't be able to repot several times in one year.
Not sure why you would want to.
Repotting slows growth.
It's not necessary for most trees.
Unless you're thinking it would be a way to develop a tree fast...there are no fast bonsai, unless you want to pay for someone else's time.
Patience is a must developed skill in bonsai, no way around it.
Siberian elm will probably do fine in your area.
I do confess patience is a weakness of mine. I work on it daily. However I'm not necessarily trying to develop a beautiful tree as one should seek to do, but rather a tree I can abuse to learn from to avoid damage to better trees I intend to produce in the future...
Perhaps I am a fool for considering such things