i don't know about dog fennel; but we have bitter weed and just a little bit will ruin a bucket full of honey
bud1, if you have bitterweed over there I feel that we have it over here, also. How often do you encounter this? Is it a regular occurrence? Do you harvest before the bitterweed blooms? Seems I read in an old book that in Florence, AL that they harvested by the first of July to dodge the bitterweed... ??
Thanks for the information,
Ed
ETA: Old book was Gleanings in Bee Culture, Jan 1, 1906