I did my ground prep in the spring as I didn't get my first rhizomes until late March anyway. But I did do a bit of work to build the three beds (for Chinook, Centennial and Cascade): First I dug out the boney soil in 3 foot wide by 8 foot long strips, about 18 inches deep. Then I mixed 50/50 compost/loam plus some general purpose fertilizer to fill the beds to around 6 inches above grade.
After planting the rhizomes I covered the beds with a couple of inches of bark mulch, and set up a drip irrigation system with a 2g/hr emitter at each rhizome, and set it to run for 90 minutes every other day. When the rhizomes sprouted I cut off all but the one strongest looking bine on each rhizome and let 'em rip. This pic shows the Centennial and Chinook bines in late August, a few days before the first harvest (the Cascades were out of frame to the left).
I ended up with a pound and quarter (dry weight) of cones, not too shabby for a first year crop. I've since used all but a couple of ounces of the Chinook and Casade and they were kick-@ss! Way higher alpha content than I expected...
Cheers!