Queen Cell Timeline
Calculate mating and laying timeline from a known queen cell emergence date. Perfect for purchased cells or grafting schedules.
Whether you've purchased queen cells from a breeder or you're transferring cells from your own grafting operation, timing is everything. A virgin queen needs time to mature, take mating flights, and begin laying, but how long should you wait before checking? This calculator takes the guesswork out of the process by showing you exactly when to expect each milestone based on your cell's emergence date.
Cell Details
The date the virgin queen will emerge (or has emerged) from the cell.
Extra margin added to the 'check by' date.
Tip: For purchased queen cells, the seller should provide the expected emergence date. If buying capped cells, emergence is typically 8 days after capping.
Timeline
Development Milestones
Queen Emergence
Virgin queen emerges from cell
Sat, Jan 24
Orientation Flights
Virgin queen takes orientation flights
Tue, Jan 27 – Sat, Jan 31
Mating Flights
Queen takes mating flights (weather dependent)
Thu, Jan 29 – Sat, Feb 7
Earliest Eggs
Earliest likely egg-laying date
Sat, Jan 31
Typical Eggs
Most likely to see eggs by this date
Sat, Feb 7
Check by Date
Latest typical date before investigating
Mon, Feb 16
When to Expect Eggs
Don't expect eggs before
Too early to see anything
Sat, Jan 31
Typical egg-laying begins
Most queens start by now
Sat, Feb 14
If no eggs by this date
Consider investigating
Mon, Feb 16
Save & Export
Label this hive/nuc so you know which one to check
Assumptions & Notes
- Virgin queens take orientation flights before mating (days 3-7 post-emergence).
- Mating flights occur days 5-14 post-emergence in good weather.
- Queens mate with multiple drones over several flights.
- Egg-laying typically begins 2-5 days after successful mating.
- Poor weather can significantly delay mating and extend the timeline.
Frequently Asked Questions
How long after a queen cell emerges will she start laying?
A virgin queen typically starts laying 10-14 days after emergence. She needs 5-7 days to mature, then 1-3 mating flights over several days, followed by 2-3 days before egg-laying begins. Weather delays can extend this to 3+ weeks.
When should I check a queen cell for emergence?
Queen cells typically emerge 16 days after the egg was laid, or about 8 days after capping. If you purchased capped cells, the seller should provide the expected emergence date. Check the day after expected emergence. An open cell with a hinged cap means success.
What if my queen cell was chilled or shaken during transport?
Queen cells are fragile. Chilling below 90°F (32°C) for extended periods or rough handling can kill the developing queen or cause deformities. If a cell fails to emerge or the queen has wing issues, the cell may have been damaged. Always transport cells in a warm, padded container.
How do I know if my virgin queen mated successfully?
A successfully mated queen will begin laying fertilized eggs (which become workers) within 2-5 days of her last mating flight. Look for single eggs centered at the bottom of cells. If you only see multiple eggs per cell or eggs on cell walls, you may have laying workers instead.
What are signs a queen failed to mate?
Signs include: no eggs 3+ weeks after emergence, only drone brood (domed cappings) from unfertilized eggs, a queen with a slender abdomen that never plumps up, or the queen disappearing entirely (lost on a mating flight). At this point, you'll need to introduce a new queen or combine the colony.