My hops are all doing well, but a word of warning for anyone using container hops like me:
The drainage holes on / near the bottom of the planters do not serve their function as well as they should when using rich soil (i.e. with compost/manure/etc), and as such the bottom part of the planter will collect standing water and may rot, killing the plant, or at least hurting it.
A cordless powerdrill (less risk of electrical shock from water contact) with a 1/2'' bit works nicely to make a few drainage holes at the bottom on the sides for added drainage.
When I did, some swampy water flowed out a couple of the pots right away.
If you are using clay or ceramic, drilling may crack the pot. This is best for plasic or wood pots.