I believe what you are observing to be the time of day the buckwheat flower releases its nectar. Some years ago I then had my hands on a report from an Agriculture Dept somewhere in Russia, with much detail around this topic. There was said to be a wide variation in the varieties of Buckwheat, as well EDW > :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::