Hello. I'm having trouble with my meyer lemon, planted outdoors in zone 10. It put out new leaves this spring and a host of blossoms, but it doesn't look healthy. It's got some kind of infestation because I can see ants on it, but I'm having trouble figuring out what it is. I found some branches with ants on them with scale, which I have removed with my fingers, but the ants are also tending other branches which do not appear to have scale. Also the leaves have yellowing and are coarse and small, with a sort of shiny coating on them. There are lots of blossoms but they tend to fall off and not produce fruit. Some of the leaves have some black powder on them, which I think may be sooty mold - I've been cleaning that off with a cloth. I try to give it a good soak once a week now that the rainy season seems to be over. I gave it some iron a few weeks ago and some citrus fertilizer a few months ago. Some photos are below - any advice would be very much appreciated!