I've grown about a dozen or so jawbreakers into 150+ in a little over a year. For them to look their best, low light, low flow, and some nutrients (nothing crazy, but you don't want a sterile tank). To get them to drop babies constantly I keep them in slightly higher light and much higher flow.
My theory is that they don't necessarily like the areas of higher light a d flow, so they start to walk in an attempt to find a spot deemed mote suitable. In doing so, they leave a trail of blobs which themselves turn into new jawbreakers.
That stated, I've grown them out with the intent of selling/trading them. I keep them in a large, DIY "mushroom box" so I can move then around whenever I want to. Which I should have mentioned... sometimes I will put a little bit of rock rubble on top of them, which will also cause them to move, and drop more babies.