Red Bamboo Honey (Japanese Knotweed)-The Japanese Knotweed (aka Red Bamboo) is a rich source of late season honey. These plants bloom in late August and September. The honey our bees gather from these plants is dark, robust, with an earthy, nutty taste. Red Bamboo has a deep and dark red color when held to the light. We find this honey to be a little less sweet and very thick.