Hi, just planted 5 varieties of my first hop "farm" (Willamette, Goldings, Sterling, Cascade, Centennial) in my mom's back yard here in Southern California because I don't have a backyard where I live.
Anyway, as I was planting she asked whether hops had deep roots and I said I didn't think so, but now I have done some reading and in fact it sounds like they do. We had problems at our house in the past with a plum tree's roots actually penetrating an old sewer pipe which cost a lot to fix.
Should I be concerned about the hops doing the same? Are there good ways to limit the root spread without adversely affecting the hops?