I have a plant that's 3 months old. My leaves are started to turn brown then yellow at the tips and 2 have blackish spots appearing on them. It has already started to bud and whatever is effecting my leaves doesn't seem to be affecting the bud and leaves growing with them. I'm using the sun to Grow it and just some regular city water. Any reccomendations on what type of water to use or filters and etc. Thanks any help is welcomed and much needed.