Ok, so I have a few different problems that I need help with fixing. I just noticed that there are ants crawling around on my plants and I'm not sure how to get rid of them. I just sprayed them with neem oil about 4 days ago but then the ants showed up after I sprayed. I heard that sprinkling cinnamon around the base of my plant and around the container keeps them away, but would cinnamon harm my plant at all? The second problem I have are some spots that are on some of my leaves. I'm thinking that it might be calcium deficiency or pest damage or maybe even a ph problem but I'm not sure. The last problem that I have is these marks that I noticed on the stem of my plants. Is this normal as they get bigger or is this something that needs to be treated?