I have a question. I have a pot of spearmint on my back porch in partial shade. I just bought it this season, and it was doing very well at first, but about two or three weeks ago it started losing leaves. The leaves toward the base of the plant are turning brown and drying out and dying. My mom said it looks like it is getting to much sun, but it is in partial shade, and I would think if that was the case the leaves at the top would turn brown before those at the bottom.