Queen Rearing & Grafting Timeline
Manage queen grafting batches with key dates for capping, transfers, emergence and mating checks.
Queen grafting is the gold standard for controlled queen rearing. It lets you select genetics, time your production, and raise queens when you need them. But juggling graft dates, capping windows, transfer timing and mating checks across multiple batches gets complicated fast. This calculator keeps you on track by generating a complete schedule from your graft date, so you never miss a critical window.
Calculator
Graft Details
Younger larvae produce better queens. Ideal is 12-24 hours post-hatch.
Timeline
Schedule
Graft Date
Larvae grafted into cell cups. Typical larval age (~12-24h)
Fri, Sep 11
Cells Capped
Queen cells should be capped
Tue, Sep 15
Safe Transfer Window
Safe to transfer capped cells to mating nucs
Wed, Sep 16 – Mon, Sep 21
Queen Emergence
Virgin queens emerge
Wed, Sep 23
Safe Caging Window
Safe to cage/ship virgin queens
Thu, Sep 24 – Sat, Sep 26
Mating Flights
Queens take mating flights
Mon, Sep 28 – Wed, Oct 7
Check for Eggs
Check mating nucs for eggs
Wed, Sep 30 – Wed, Oct 7
Final Check
Final assessment - cull or replace failed queens
Fri, Oct 16
Cells capped
Tue, Sep 15
Queens emerge
Wed, Sep 23
Check for eggs
Wed, Sep 30
Final assessment
Fri, Oct 16
Save & Export
Save this 2026 (White) queen to a hive
Start tracking freeAssumptions & Notes
- Ideal grafting larvae are 12-24 hours old (just hatched, floating in royal jelly).
- Cells are typically capped 3-4 days after grafting.
- Transfer capped cells to mating nucs 1-6 days before emergence.
- Virgin queens can be caged for shipping 1-3 days after emergence.
- Keep detailed records of each batch for improving your process.
Queen Rearing Calendar at a Glance
Grafting is just the first date in the queen rearing calendar. From the day you graft, the schedule is predictable, which is exactly what makes planning batches and mating nucs possible.
Graft larvae
Transfer 12-24 hour larvae into queen cups and give them to a strong cell builder.
Cells capped
The builder seals the peanut-shaped cells. Now you can count down to emergence.
Move to mating nucs
Transfer capped cells a day or two before emergence so each virgin emerges in her own nuc.
Queens emerge
Virgins chew out and harden off before they are ready to fly.
Mating flights
Weather permitting, virgins fly to drone congregation areas and mate over several days.
Check for eggs
Look in the mating nucs for a laying queen. No eggs by day 26 usually means she failed to mate.
Days are counted from your graft date and assume larvae grafted at about 24 hours old. Cooler weather pushes mating and laying later, so treat the back end of the calendar as the earliest, not the deadline.
Frequently Asked Questions
How old should larvae be for grafting?
Ideal larvae are 12-24 hours old, just hatched and floating in a pool of royal jelly. These young larvae haven't been fed worker diet yet, so they develop into high-quality queens. Larvae older than 48 hours produce inferior queens with fewer ovarioles.
When do queen cells get capped after grafting?
Queen cells are typically capped 3-4 days after grafting (around day 8-9 from the original egg). You'll see the bees seal the cell with a distinctive peanut-shaped wax cap. This is when you can safely move cells to mating nucs.
When should I move cells to mating nucs?
Transfer capped cells to mating nucs 1-2 days before expected emergence (around day 14-15 from egg). This gives the virgin time to emerge in her new home. Avoid moving cells on emergence day because you risk the queen emerging during transport.
What's a good acceptance rate for grafts?
Experienced grafters achieve 70-90% acceptance. Beginners often see 30-50% initially. Factors affecting success: larval age, cell builder strength, nectar flow, humidity in the grafting room and practice with the grafting tool.
When should I check mating nucs for eggs?
Check for eggs 10-14 days after emergence. Earlier checks risk disturbing the virgin during her mating period. If no eggs by day 21 post-emergence, the queen likely failed to mate. Replace her or combine the nuc.
Related Tools
Embed this calculator on your website
Club site, blog or shop? This calculator is free to embed. Paste the code below into your page's HTML; it sizes itself automatically. All we ask is that you keep the credit link underneath.
<iframe src="https://apiarytools.com/embed/grafting" title="Queen Rearing Timeline" loading="lazy" style="width:100%;border:0;border-radius:12px;background:#fff" height="1200"></iframe>
<p style="font-size:12.5px;margin-top:8px;text-align:center;color:#78716c;font-family:system-ui,-apple-system,sans-serif">
<a href="https://apiarytools.com/tools/grafting" style="color:#b45309;font-weight:600;text-decoration:none">Queen Rearing Timeline</a> · more <a href="https://apiarytools.com/tools" style="color:#b45309;font-weight:600;text-decoration:none">free beekeeping tools</a>
</p>
<script>
if (!window.__apiaryEmbedResize) { window.__apiaryEmbedResize = true;
window.addEventListener("message", function (e) {
if (e.origin !== "https://apiarytools.com" || !e.data || e.data.type !== "apiary-embed-height") return;
document.querySelectorAll('iframe[src^="https://apiarytools.com/embed/"]').forEach(function (f) {
if (f.contentWindow === e.source) f.style.height = e.data.height + "px";
});
}); }
</script>