I have 150+ hills of hops, 2/3 of the hills are 2-3 year, 1/3 new rhizomes cut from my own plants. It was a tough year in NY for newbie plants this year, They grew but they were lame, stringy, and only minor amount of cones. Too much early season rain, and too much intense heat early season.
One thing to remember is that new rhizomes have shallow roots close to the surface. A couple of sunny hot days, without watering, can dry the ground to a fatal level for the plant. I usually water daily at sundown so the roots have maximum exposure to the moisture. When I go on vacation, I have to make sure they get watered at least every other day by someone, daily, if temps are near 90 degrees. Hops love and need water, but they don't like to be flooded.