2 snips from ApisBee: No in the Okanagan it is so dry that by mid August there is no nectar coming in except from knapweed which has a bitter sap in the stems and is in the nectar also causing the honey to be bitter tasting. Here in the Okanagan we have knapweed that produces a light colored honey that has a pleasant aroma but when tasted it first tastes sweet and mild in flavor but once the sugars have gone your left with a bitter aftertaste in your mouth. Second Opinions? Third Opinions? I should have one of my own in a few days. I have been grinning for weeks, up until now, with several acres of knapweed growing near my hives. The field south of me has a pink cast, there are so many of them.