The hallertau are troopers in less then a week I have two tall sprouts.
Sent from my iPhone using Tapatalk
Mine grow really well. Production of cones is another story.
so now I am curious. did your Hallertau not produce any cones? or just a few. I am wondering if it's a dark/light cycle thing. If a variety is bred for a certain latitude it may need more hours of darkness to really produce flowers. If this is the case you might try (and this is going to seem like a huge PITA) trying to create a light tight environment around the bine so that you can extend the hours of darkness beyond what mother nature is providing. If it works it would probably only take an extra hour or so of total darkness.
just a thought
I got a double handful last year off the Hallertau, Tett, EKG. The Euroean varieties don't do well here. Cascades and other US varieties are productive.
I am at 42o
3' which should not be a problem. Aroma hops groen in the USA are mainly the Willamette Valley, which is 44o
. The Hallertau is about 480/sup].
Soil and climate are the reasons I wuld think to be the first things to blame. The hot dry spell we alway get in July-August when the cones are growing is what I blame. The Hallertau is relatively mild, as is the WIllamette Valley. They did the hybrids such as Mt. Hood, Liberty, Ultra and so on to get better yields even in the Willamette.