Hi All,
Apologies if some of this has been covered, I've only scanned the thread.
Commercially, the longest day of the year, about a week's time, is when the hops reach their limit on wirework, any further growth blocks light and reduces yield, just take this into account if your bines are getting less sunlight lower down, let the light in and they yield (existing cones develop better) further down.
jceg316
With regard to cutting back hops at the beginning of the season, this is done to prevent the above occurring, so the hops reach the top on the longest day (give or take a week depending on variety). If you have a mild winter, hops can get off too early and need cutting back. This year, the cold lasted quite late into the year, therefore was not needed as the hops were held back. if the second shoots came back stronger, growers would have the issue of sunlight mentioned above. What you say about training only 4 bines is good for this reason, if the plant becomes too bushy, yield suffers because of sunlight issues.
I also notice that your comments about US hops seem to be behind UK varieties, they do come on song later, as the growing season is longer in the US, therefore when grown in the UK, should be picked late September (last week), at the roughly same time as Target, UK commercially grown US hops have replaced some Target acreage, as it fits in with their picking window.
Hope this helps
BR
Hoppy