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The first largest bines to emerge on 2nd year or older hop crowns are not necessarily the best to train. These "bull" shoots have a large hollow core, like a straw; and easily kink or are damaged by late spring storms. Most crowns put out two to three of these, at the most; and crews can be trained to identify them and prune them out as they twirl climbing bines. "Bull" shoots are often a light olive green color with stretched internodes - some field practice clipping a few will reveal which have the hollow stems.
Lynn, the head hop grower at Great Lakes Hops has over 30 years of experience in the horticultural field. Browse the blog articles here to find useful growing information for humulus lupulus, based on personal experience and observations at Great Lakes Hops.