>>That wasn't an average. It was a few exceptional hives in an exceptional year. Over the years my average is about 45lbs. The good year it was 60lb and this year probably <20.
I assume this is mostly due to your local weather conditions since it's been mentioned here that Amm outproduces other bees there.
I wonder if an unlimited broodnest would increase your yields - has it been tried? They will raise more brood vertically than horizontally.
I was somewhat skeptical about the info at first but tried it this year and saw my yields double to an average of about 265 lbs. I saw great increases in a course of 2-3 days with so many bees. [Made keeping the nests from getting flooded with nectar tricky. Two empty medium at a time ahead of time were helpful.] Rainy weather influnce seemed greatly lessened.
The above figure includes 40lb after a migratory move to goldenrod which failed miserably due to a late season drought. In a favorable goldenrod season, my guess is they could bring in 100-200 lbs here. They have brought up to 120 lbs to a double deep with an excluder.
Waldemar
Long Island, NY
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