She told me that you can bonsai pretty much anything as long as you do it in stages. She pulls up established plants but only after trimming back a lot of the foliage, giving the tree some time to recouperate (normally when they are in dormancy) and then she takes them out and cuts the roots back. She does it over the space of a year so she has to start stock well in advance of the sale season. Her bonsai's were gorgeous.
I really wanted to buy a little rose that she had but it was way out of my budget. I suppose I'll have to try grow my own.
The trunk of your bonsai is great, I love it when they are super hefty at the bottom, it gives them so much character. I'd love to see it in a year from now 😁