I think we got the hop rhizomes a little later than that last year.
You need to put them in a raised bed, raise it by digging in a few sacks caow manure. do not let the roots get waterlogged, I watered by slowly running hose once a week, Early in the season they need a bit of shade, by late spring when they have grown a bit they need lots of sunlight, plant facing north where they will get the sun all day.
From my 3 first year vines I got 500g green hops, equivalent to 125g dried hops. hope to get more like 500g off each vine this year.
Have ordered 24 Goldings rhizomes, available for $25 each (unless they cost more than what I paid last year)
Jovial Monk