In the Willamette Valley, blackberries are starting to bloom on the valley floor. Time to get your honey supers ready. Make sure you remove all feeders and treatments before installing supers. Some beekeepers wait a couple of days after installing supers before installing queen excluders. This gives the colony time to start building wax in the super.
This May weather in the Willamette Valley is tricky. These wet cool days hold back the bees from building up for the main nectar flow. Keep feeding until the weather is more reliable. The stronger hives are consuming a lot of food now. This is a clue they aren't getting enough forage to mach their rate of expansion.