Cleft grafting: shaping the scion wedges
Cleft grafting, done in late winter or early spring, top-works a branch too thick for a whip graft. The hooked 7.5 cm blade shapes the scions; the heavy splitting is not its job.
- Saw the branch off squarely and split the stub down the middle with a cleaving tool or an old chisel tapped in with a mallet, never by levering with a folding knife.
- Wedge the split open, then shape the base of each scion into a long, tapering wedge with two clean cuts of the grafting knife, leaving the outer side slightly thicker.
- Push a scion into each side of the cleft so its cambium, the green layer under the bark, meets that of the stock.
- Remove the wedge so the stub grips the scions, and seal every cut surface with grafting wax.
