Hello....I planted these three plants together this summer. In the last few weeks the tips of the leaves have started to turn brown. The container is on the west side of our deck and gets full sun most of the day. I don't know if I'm over or under watering it. I just added some slow release granules. I'm very new to gardening and this is my first post. I am enjoying this website very much and am learning so much from everyone. One day I hope to contribute as well!