Today I began queen rearing.
In order to increase bee density in the cell-building hive, I removed every brood-containing frame and divided those frames among other hives for safe keeping.
The cell-building bees are now dense, queenless, and are prepping my cell cups...tomorrow I graft larva and place them in the cell builder.
I removed all the brood because I wanted all the resources in the cell-builder to go toward rearing queens rather than toward rearing brood. But eventually I need to return most of that brood, yes?
So...my question: When can I return the brood (that I distributed among my other hives) to the cell builder?