Illustration of grafting technique of bonsai skin insertion

For bark grafting, the phloem of rootstock is easy to peel off, and the rootstock is thicker than scion. The scion should be cut longer to increase the contact surface. The advantage is that the survival rate is high, and the disadvantage is that the grafting speed is slow, and after survival, it is necessary to bind the new shoots with stents to prevent fracture. Mulberry, it is best to insert the cutting face of the scion into the cortex of the rootstock (after the cambium of the mulberry is separated from the cortex of the rootstock, there are more parenchyma cells remaining on the phloem), and the scions of other tree species are generally inward.

Through several years' practice and the comparative experiment of several branch grafting methods, the author thinks that the survival rate of skin grafting is the highest, but the rootstock must be removed from the skin. The following is a diagram of the operation steps of bonsai skin grafting:

1. Choose the plant varieties and rootstocks you want to graft.

In order to be successfully grafted, you must cut a scion (a small piece for grafting) from a healthy disease-free plant variety (source tree) and a suitable growth tree (rootstock). The scion should reach three dormant periods, or it is not budding. There are three to five buds on the branches about 0.3 m long. The rootstock should be straight and smooth, with vertical branches 2.5-5 cm in diameter. Once the bark has begun to slip (when it is easy to peel off in the spring), it is time for a bark transplant. This kind of grafting is usually used when the rootstock is too big to do branch grafting.

2. Sawing off the rootstock

Cut straight off one of the branches with a sharp saw, without cutting the bark or wood of the branches. Be sure to leave a nearby sprouting branch to keep nutrients moving to the tree.

3. Prepare scion

Cut the scion to about 12.5 cm long, while each scion retains about 5 buds. Begin to cut diagonally to the base from around 7.5 cm of the scion.

4. Prepare rootstocks

Place each scion opposite the rootstock and expose a scion section of about 0.3 cm to the rootstock. Use a sharp knife to cut the outline of each scion on the rootstock. Move the scion to finish cutting the bark so that each scion is tightly filled into their space.

5. Use scion

Place each scion on the rootstock, and pay special attention to ensuring that the green layers of the two are accurately aligned. Once in place, two spikes are hammered on each scion to keep them connected to the tree.

6. Sealed transplantation

Pour the graft wax or asphalt emulsion into the transplanted area and seal all cut surfaces to prevent dryness and bacteria from entering. Check the seal again the next day to make sure that no holes will expose the surface.

7. Take care of the grafting site

Remove all buds that grow under the graft. Once one scion grows better than the others, prune the others that do not grow successfully. After two summers of transplantation, remove all the branches and buds except the strong scion.

Time: 2019-06-09 Click: