?2 on dry sugar. Last year I put newspaper on the top frames, poured a 4lb bag of sugar on the newspaper. I did not spray it with water. I jabbed a few holes down through the newspaper in the middle area so the bees would have a start on eating thru. I had made a 1" shim, and put that on, then the inner and outer covers. But probably would have been fine with a shallow or medium box then the outer cover only. (To have room for the pile of sugar)
In the spring, some colonies had taken more, some less, but the sugar was crusted to demonstrate that it had absorbed a significant amount of moisture, which is I think a good thing. All (only 5) colonies made it.
Attached is a picture from spring.
I'm in Charlotte NC which has significantly warmer weather and also more humidity than Moses Lake.
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