Grafting is what gives you real control over which genetics become your next queens, instead of leaving that choice entirely up to the colony during a swarm or supersedure. It looks intimidating the first time, but the actual technique comes down to a handful of details done consistently.
This guide covers preparing your breeder queen, setting up a starter hive, picking the right larvae, and the grafting process itself.
Prepare Your Breeder Queen Frame
A few days before you plan to graft, confine your chosen breeder queen to a single deep with fresh, undrawn frames. Timing this deliberately means you know roughly how old the resulting larvae will be by the time you're ready to graft, rather than guessing at ages once you're already in the hive.
Set Up a Queenless Starter Hive
Gather nurse bees, roughly 4 to 12 days old, which are easiest to find clustered on frames of open brood. Sweep or shake them into a separate box along with some pollen, bee bread, and honey. Leave out anything with larvae in it, and make sure there's no queen in the box at all.
Let that box sit queenless for at least about 12 hours before introducing your grafted cells, sometimes longer. This gives the colony time to become genuinely, "hopelessly" queenless, which is what actually drives nurse bees to commit fully to raising replacement queens from whatever young larvae you give them.
Choose the Right Larva
A larva that's about one day old is the target. Queens lay in an expanding pattern, so the youngest larvae tend to sit toward the edges of the laying area on a frame rather than the center, where the oldest brood usually is.
Look for larvae floating in a generous pool of royal jelly, still tiny and tightly curled. If a larva is sitting at an awkward angle for the way you naturally scoop with your grafting tool, it's fine to skip it and find one oriented more conveniently rather than fighting a difficult angle on every single graft.
The Grafting Technique
Move the queen off the frame first. Before you start grafting from a frame, find the queen and gently relocate her to a different frame so she's out of the way and safe from being injured while you work closely on the comb. For the safest way to handle her, see the guide on finding and handling your queen.
Don't shake the frame to clear bees. Shaking can cause larvae to flip inside their cells, which ruins them for grafting. Use a bee brush to gently clear bees out of your way instead.
Scoop gently, don't push. Using a grafting tool, slide the tip underneath the larva without pushing down on it, lift it out on its little raft of royal jelly, and lower it gently into a cell cup. Take a reasonable amount of royal jelly along with the larva, but not so much that you can't get a clean scoop underneath it.
Release her gently. Don't consider a graft finished until the larva has actually come free from the tip of the tool inside the cup. Forcing it off can injure her.
Prevent Dehydration
Larvae and the royal jelly they're floating in can dry out surprisingly fast, especially on a hot, windy, or dry day. Cover each grafted cell with a damp paper towel immediately after placing the larva, and work at a steady pace rather than lingering over each one. I've grafted outdoors on plenty of rough days, and the wet paper towel habit is the single thing that's saved more grafts than anything else I do.
Move Grafts to the Starter Hive Without Delay
Once your bar of cells is complete, get it into your prepared starter hive right away. Newly grafted larvae need to be fed quickly, and waiting around risks losing them before nurse bees even get the chance to start caring for them. Slide the bar into the middle of the queenless starter box and close it up.
From there, the cells typically stay in the starter hive for about 24 hours before moving on to a finishing hive with more resources to complete their development. For that next step, see the guide on setting up a finishing hive for grafted queen cells.
Signs of a Good Larva to Graft
Swipe sideways on the table below if you're on a phone and it doesn't fit your screen.
| Good Sign | Skip This One |
|---|---|
| Tiny, tightly curled larva | Larger larva filling more of the cell |
| Sitting toward the edge of the laying pattern | Sitting near the center, likely older brood |
| Floating in a generous pool of royal jelly | Little to no visible royal jelly |
| Oriented conveniently for your scooping angle | Awkward angle that risks a bad scoop |
Frequently Asked Questions
How old should a larva be for grafting?
About one day old is ideal. These are the youngest larvae you'll typically find, usually sitting toward the edges of the queen's laying pattern rather than the center.
How long should a starter hive stay queenless before I add grafts?
At least about 12 hours, sometimes longer. This gives nurse bees time to become genuinely, hopelessly queenless, which is what drives them to commit fully to raising the larvae you provide.
Why can't there be any larvae already in the starter hive?
If other young larvae are present, the colony may start emergency queen cells from those instead of focusing entirely on your grafts, diluting your results and creating cells you didn't plan for.
Why shouldn't I shake bees off the frame I'm grafting from?
Shaking can cause larvae to flip over inside their cells, which ruins them for grafting. Gently brushing bees away instead keeps the larvae undisturbed.
How quickly do grafted cells need to go into the starter hive?
Right away. Newly grafted larvae need to be fed quickly, and delaying risks losing them before nurse bees have a chance to start caring for them.
What do I do with the cells after they leave the starter hive?
They typically move to a finishing hive with more resources for the rest of their development, and eventually need to be pulled at the right time and possibly incubated before going into mating nucs. See the dedicated guides on setting up a finishing hive and on queen cell timing and incubation for those next steps.