My black raspberries are in ground and they don't spread except by tip rooting. I just currently don't have any more good in ground locations (plus my soil is a lot of clay). I did find my blueberries prefer only half a day of sun (that's what my raspberries currently get). For the blueberries I'll probably sink the pots in the ground for now since it's cheaper than redoing all the soil there to make them happy. I'm going within a few years we can move to the country where I could then plant things in ground more.
