Look I'll give you some free advice in the opposite direction because I realize the above post sounds a bit harsh.
If you want to multiply your hops, take them out of the pots straight away and plant them in the ground. Then when you have bines growing bury the first couple of feet of bine in the ground before running the bines up the string. You need to do that now at the beginning of the growing season. The length of bine that you have buried will become rhizome that you will be able to lift next year in autumn/winter.
The reason I have been as blunt as possible above is because you don't seem inclined to growing hops commercially. You've started off by creating a lot of unnecessary work and extra expense by going to the trouble of filling large pots and so on. Think efficiently.