I've got a raspberry that is producing, and growing like a weed. It's about the same footprint and height as a washing machine this year, which is about a 300% increase over last year. My question is, as I was mowing yesterday, I was trying to get the grass out from under it and noticed that there are 2 additional plants coming up out of the yard, 2-3 feet from the mother plant. I want to move them to a new location, but I don't know if they're coming up from a "runner" or if they've sprouted from seed. Anybody have experience with this? I don't want to damage either plant, but at least one has come up in a location where it will be an issue when it gets big.