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Ficus benjamina – trunk fusion project

Ficus benjamina – trunk fusion project

I will open my blog presenting a project that I have worked on for about half a year or more. Its a Ficus Benjamina trunk fusion project. I have bought from a nursery 6 ficus trees about 30cm high each and using natural raffia I tied them to fuse in one trunk. I had an unpleasant surprise, that after about 2-3 months, the trunk from the center of the fusion died and this did not allow the rest of the living ones to reach each other in order to start the fusing process. Hence, the only solution was to cut the raffia, remove the dead trunk and tie it again with new raffia. This was done somewhere in the beginning of April 2017.

In the picture above you can see the tree after removing the dead trunk from the center. I left it to develop leaves, roots and to thicken with the remaining trunks and start fusing them together.  Even if ficus trees are kept inside as these are tropical species, I have observed that during late autumn and winter, these are slowly progressing due to lack of strong sunlight. However, from late spring till late summer are growing quite fast. I keep my ficus trees on a windowsill where they avoid direct sunlight at midday but from afternoon till evening the light reaches their leaves. This proved to be a good position for them and by their development, I would say that they like it and combined with proper fertilizing and watering, at least for my flat, this is the optimal position.

In July 2017 watching the progression of the tree, I have decided that it is time to remove the raffia, wire the branches into the right position and trim those where it is needed and repot the tree working a little to place the roots into proper position. At the moment of decision, the tree looked like in the image below.

In just a few months it developed many new leaves and the trunks fused together. The raffia ties already started cutting in the fused trunk so I decided that there is no more time to wait and I have removed it. In the closeup picture below you can see the marks caused by the raffia ties. However, a nice thing is that with ficus, these heal quite fast and what remains is some nice texture on the bark. To be honest, I have left on purpose the raffia on for reaching these future textures.

The next step was to wire each branch in the proper position and in the same time giving them a little bit of movement as ficus branches tend many times to grow perfectly strait. Where I had thicker branches I wired around it and moved it into the correct position. With thin branches, wounding the wire around it is more than difficult and also dangerous as these branches can break quite fast. So what I do is I pre-wound the copper wire on a thin screwdriver to obtain a coil with the inner diameter larger than the branch. To place this coil on the branch is very simple, you just have to rotate it like a screw around the branch. After the wire is in place, you can now twist and shape it to move the branch where you desire. The outcome of my wiring process can be seen in the picture below. It is important to mention that from now on I have to pay serious attention as the tree will grow and the wire can cut into the branches. So where it will be the case, it has to be removed and replaced with a loosen one.

As said earlier, the plan was to also repot the tree. First I prepared a new soil composition. What I use is lava, clay (fine mixed with course) and nursery planting soil. The mix I use is 4-4-2. In the image below, from left to right is the lava, the fine clay and the course clay. Mixing 4 parts of each with 2 parts of soil proved to be a lucrative solution for my trees.

I live in Romania and here, bonsai art is not too evolved so it is more than difficult to find tools, pots, soil or any other stuff that you would need. So many times I need to improvise and find solutions with what I have at my disposal. As pot for my tree, I bought a ceramic tray used probably for cooking, but I liked it and considered to suit quite nice my tree. I have drilled holes in it and covered those with draining screens as it is usually done.

Here is a closeup of one hole that I have drilled in the bottom of the tray. It came out quite nice. Two such holes are more than enough to ensure good draining of the soil.

Next, I removed the tree from the old pot and started working around the roots, combing out the old soil and trying to untangle the twisted roots. Before starting this entire repotting process, I did not water the tree for a few days to be able to work the roots easier. If the soil is wet, it sticks to the roots and forcing to comb out the roots can break them and loss of too many roots can endanger the survival of the tree. I use as a comb an old fork that I have bent a little each spike’s end. Seems to be a helpful and very cheap tool.

After removing all the old soil, I washed the roots of all the remaining dust and combed again gently the feeder roots in a radial shape, untangling them all. I also cut some roots that were growing directly under the tree, as I want all of them to grow only to the sides and not under it.

On the bottom of the pot I evenly distributed a layer of the new soil and placed the combed roots over it, making sure that these are in the proper position. Even if it is against my way of fixing trees to the pot, as this one is quite tall, about 55cm high, I passed a wire through the drainage holes and tied the tree to the pot making sure it will not trip over. I will remove this wire then the new roots will bound the pot and will be able to keep the tree in position.

Finally I filled the pot with the new soil, and worked it around the roots with a chopping stick to make sure that no air pockets remain to damage the roots. A heavy watering to ensure that all the soil is wet was the last step. Now I have placed the tree back on the windowsill and wait for it to see how it reacts to the new changes. Hopefully on my update on this tree I will show improvement and growth compared to this moment. The result of today’s work is in the picture below.