Topiary of herbaceous stems?
I am a hobbyist who regularly topiaries or trains coleus into standards of different heights and sizes, and recently I've been wondering if it's at all possible to "trunk train" an herbaceous plant, or are the stems too malleable? If so, how would one go about it? I couldn't find any information or pictures on the internet. I was thinking something like you see with money plants - the twisting of two trunks around one another.