I've tried everything else to deter the ants here from moving into my pots and farming aphids and mealies. Never thought of cinnamon, but it couldn't hurt, and if it helps, it would be a lot less toxic to the environment. I get the huge containers because it's a natural antibiotic, and helps with arthritis, and is also a fungicide, so I use it to dust cuts or signs of rot on my orchids. One of those things we all have in the cupboard, but never think to use for anything beyond the purpose we bought it for.
