I'm in northeast Ohio. Nothing here is blooming yet aside from some crocus and a few other bulb plants. Over the last week I have seen piles of pollen dropped by the bees as they navigate the small entrance on my reducer. The pollen mostly greenish-gray in color. The bright yellow pollen I see coming in I assume is from the crocus. Not quite sure what the greenish and gray stuff would be coming from. Any ideas? I am just curious because I don't see much of anything growing, let alone blooming.