I was talking with my Dad tonight and he mentioned that the Nuggets I planted on his property circa '94 were still growing. This was my first hop plant. Got me to thinking about pulling some rhizomes next year to bring to Portland. I'm having a hard time finding information on the lifespan of hops. Wondering if I cut "young" rhizomes if its like starting over or if the viability of the root stock is cumulative for age of the mother plant. I have no idea how old the original cutting I purchased was. How long do hops live productive lives?