This year many of us are using packages from down south due to winter losses in area. If the package queen doesn't lay, how long until laying workers develop? Or said another way, how long until it will be hard for a new queen to be accepted.?

To help a friend with this problem (four weeks after package install), we are trying the "add a frame of open brood each week" for 3 weeks, and if they don't raise a queen by then we will have received a replacement queen -- but the package bees are obviously older than average at this point.

(Finances prevent combining these bees with another hive and installing a new package.)