So... its been a little more than a month when the planter was set in place. Since then, I've planted the last two Columbus rhizomes and ran the rest of the lines. Sadly, one of the new plants did not make it. I reordered two more from B. Crosby Hop Farm (which I highly recommend) out in Oregon.
Ordered 2 and got 3, thank you very much. I put one in the open spot of the planter and the other two in nursery pots at the end of the porch. Once they become established, I'm gonna plant them in the ground out by the fence. Just to see how they grow with less attention. As you can see, both 2nd year Cascades are doing great with no issues.