I've got the same situation on a Nugget hop plant that is a 2nd year plant. It's reached the full height of my 12' trellis design already, and it's bushing out at the top. It's got little BB sized hop flowers now, but hundreds of them. AND I just planted 5 Cascade rhizomes this spring, and TWO of them are already at the full 12' height and have hop flowers on them already. First freaking year, only 2 months in the ground. These are amazing crops...