Some ants have taken a liking to a lavender in a large terra pot. I've moved it twice, hoping they would go away, but they're still there (but I didn't move it very far, just a few feet). When I moved it this morning, I saw them moving eggs, so I assume they must be established in the pot as well. The plant itself seems to be fine. I would prefer to co-exist with them, but I don't know if they're pests or good guys, or maybe neutral. They are small red ants that make typical underground nests, not the kind that make the huge above-ground mounds. They remind me of fire ants, but we don't have those up here in the NW. (I was introduced to fire ants when I was in military training in the south many years ago).
