I planted a black raspberry on my brothers yard in the humid tropics on the amazon side of Ecuador in south America. The plant grew well and produced like an ever bearer, which it probably was. It kept producing and putting down new roots from the vines that touched the ground until a renter feared it would become invasive and cut off all the vines that were trying to root. It then died. I don't know if it was the root knot nematodes that killed it or not, but I am quite sure it would have lived indefinitely if it had been allowed to "walk" in some given direction. The fruit was excellent quality, but not prolific as it produced continually.
