Trunk Fusion as a Bonsai Technique.
Trunk fusion is a method in grafting . In bonsai this technique is useful in making a comparatively large base trunk, in a relatively short time.The taper and style of the tree can be controlled from the initial stage itself. The size of the tree can decided early.
Approach grafts are commonly used. Usually one can start with two or more rooted cuttings or saplings.They are secured together with tapes or insulated wires.As the plants grow and swell, the pressure of being firmly held together ,make the pieces fuse together.Once the fusion is achieved, the tapes and wires should be removed.
Multiple approach graft involves ,securing cuttings or seedlings side by side to form a big trunk. 50 to 100 cuttings can be used.They should have a good root system to support them.Using raffia or fiber ropes , to initially secure the plants is good to prevent scars. Wiring can be done on top of this.
The plants should be placed close to each other, with out any space between them. Gaps will delay the fusion.While the process of arranging the trees is going on , care should be taken to see that the roots are not dried up. So constant misting is needed.
Once the whole process of arranging and wiring is over,plant the entire group into a growth pot, with well nourishing soil mix.Once the new growth starts, they should be allowed to grow freely. Bonsai training can start after one year of planting, when all the cuttings are fused together and the wires are removed.
Always keep a few spare trees as reserve,so that they can be replaced for any dead ones, in case if there are any.
Plants suitable for this type of grafting are different types of Ficus trees, Jade, Schefflera Etc.
