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Hi

Although my ficus bonsai foliation is good changing the leaf color has made me worry about the health of it.

Please find attached the picture of fallen leaves.

I would appreciate you if some advises are given in this regard.

Thank you for your time and consideration.

Best

howdy khorsand
are these leaves lower on the branches with healthy leaves above? if so it may just be old leaves dropping naturaly.onother thing may be not enough light .overwatering is almost impossible

Hi manofthetrees

Thank you for your response.

The most of the new leafs have just been foliated and after a while some brown dots spread through the leafs. So, changing color and dropping will be the consequences.
Please find attached the pictures of the leaf containing light brown dots.

For the case of light, the bonsai indirectly receive sunlight from the window as well as lamp lights.

I'm curious about the fertilizer. In a period, I used the following fertilizers for ficus:

Bamboo fertilizer drops
&
Liquid fertilizers containing Nitrogen, Magnesium, Sulfur, Iron, Zinc
&
Flowerfood

Could be the dropping leafs results from the kind or amount of fertilizers or there is a possibility for Pests and diseases?

Thank you again for your help.
Best

fertilizers are fine.you just need a balanced ratio of nitrogen potassium and phosphorous (NPK). try to get a fertilizer for bonsai that is urea free. urea is a salt compound that can damage roots. the flower food is usless ficus rarely flower in a pot.
how often are you watering?
can you post a pic of the whole tree I need to see it to know better what you are dealing with

This looks very much like damage you could get from over-fertilizing. However, other things are possible too..

I am not sure what else you have done. Have you recently acquired the tree? Moved it? Did you repot recently? I assume you have carefully checked the plant for insects (Most importantly: Spide mites)?

Where are you located? Northern or southern hemisphere (So in late summer or late winter?) And is the plant in or outdoors?

And yes, please, do post a pic of the whole plant.

Hi
Thank you for your consideration.
Sorry for my late response.
I give water whenever the soil becomes dry. The humidity of the soil is checked by fingers.
I have the bonsai about 5 months which has not been repot or moved. No insects has found above the soil, however, I’m not sure about under it.
I’m living in the northern hemisphere. It is in an apartment and we are in the midsummer.
Please find attached the pictures.
You’re assistance during this proses is invaluable for me.
Best

The soil seems to have some salt condesates on it. Is it just normal potting soil? that could be a problem. Also, it looks like it sits in a dark place? Ficsu loves light (Like any tree).

Hi
It is a normal potting soil. The place of the bonsai is behind the window. It indirectly receives light from sun and the lamps in my room.
The first three months the ficus was healthy. Currently, although it foliates well, the leaves drop as well.
Would repoting solve the problem?

repotting will be fine it is in a growing faze which is the best time . the internodes are short so it is not 100% healthy they tend to grow out of control when in optimal conditions.get some good bonsai soil and repot ,prune any thick long roots to half and give it more light .i think it is a light and soil issue that is causing your problems.it is not doing bad so dont worry

Thank you for your response.

I repot the bonsai with the vermicompost. Is it a good soil for bonsai?

On the other hand, I pruned the underlying thin long roots. I didn't prune the surface thick ones.

Is it necessary to change the soil and prune the bonsai again?

Thank you for your consideration.

Best