Thanks Vance for pointing out the thread on IBC. It is a real eye-opener. It is also inspirational for those of us who grow most of our material from scratch. Although I love yamadori and take every opportunity to acquire them, most of my material is grown in the grounds of my backyard.
Here is what should happen here in the US: there is a great need for reasonably priced field-grown material. The availability of such material would be a great boost to popularize bonsai in this country. Right now, most of what I see in the vendor section of any large convention, is the extremes: highly priced yamadori, and cheap material with little character. There is very little in between. So one either has to dish out serious money, or spend over a decade working on bonsai material.
The problem is that developing field-grown bonsai is an art in itself, and almost nobody has a clue how to do it. There are countless books on how-to-create-bonsai, but there is NOTHING on how to grow bonsai stock in the field, beyond a paragraph or two included in these books. Creating bonsai and cultivating bonsai stock in the field are entirely different - often requiring totally opposing techniques. That's because the main purpose of field-growing is to create character along with speeding up growth, while creating bonsai is about putting the character to use, and often restricting growth.
It's time that American bonsaists become expert in field-growing, and that a separate branch of bonsai develops, with the goal of producing these trees. We need teachers who can teach this.
I have been learning the art of field-growing for over a decade now, and there is something new that I learn every year. I wish I had the chance to learn all this in the first few years, so that I wouldn't have to waste decades, reinventing the wheel.
Field growing on a large scale can also be much more profitable than trading in collected material - due to the much higher volume traded.
Taiwan can show us the way, we just need to travel and learn from them.