I'm happy to report that one of the two Cascade rhizomes I planted two weeks ago has sprouted! After the first week, the sprouts poked up through the soil, and now are growing quickly. From what I have read, it is advisable to let these first shoots grow a bit, then prune them back and then let the next shoots mature and they will be more healthly and productive.
The other hasn't hasn't started yet, so perhaps I either planted it upside-down, or it is sick.
It's going to be hard to wait for them to produce. Especially since hops are getting hard to find at decent prices. I found some Cascade Leaf Hops