About 20 m and unlikely - we have a section with a bunch of different compound berries including a few types of raspberries and loganberries where it was planted. We are constantly fighting the spread from those patches, but they pop up fairly close. There are none in between the planted area and this one.

Some other varieties have popped up in other areas. We have another kind coming up about 10 m from these ones (forming a triangle with the original patch) and some on the driveway eminating from the garbage storage area (where the chipmunks have a nest) and also just in the front of the house interspersed with the loosestrife.