planting

In the midwest, is yellow and white sweet clover the last big nectar source before the dearth? I have some BeeBee trees that I started from seeds that I am putting in as a long term plan for some nectar during dearth, anyone have other plant suggestions along those lines? I have 33 acres...

Hello all, I'm considering adding a few trees to the yard and was considering helping out the bees at the same time. What tree would provide an extremely early pollen source in North Texas - to give my gals a head start.. any ideas? Thanks! Daniel