Thanks so much for this info, Marie! I bought one of these this past spring, thinking it was actually a vine and, while it is growing well, it's sprawling all over the place. I'm pulling out my tomato cages today. What's the best way to propagate it? I'm going to a plant swap soon and would love to share it. (I'm in Tampa, FL.)
Check some of the stems that are sprawling over the ground. Some of them may be rooted. If not, injure the underside of the stem by scraping away a bit of the stem surface, cover it with soil, and pin it down or weight it down with a brick or rock. It should root easily that way.