I have a problem y almost all my Bonsais, black tips on the leaves, new leaves and already grown ones.
All of them are in volcanic soil (the only inorganic soil available in Chile). I think it could be a problem related to toom much watering, here is later winter and became warmer. I was watering twice a day, as soon as the first soil layer is dry, but two inch below was still wet. Therefore, I guess I was watering wrong for almost 3 weeks.
I am using the following systemic fungicide. I appreciate any advice about that.
I am sharing some pictures of the leaves.
Thanks in advanced,