Avocado Tree Leaves Brown Tip Why Does My Dwarf Avocado Tree Have Brown Tips On All The Leaves?

Why does my dwarf avocado tree have brown tips on all the leaves? - avocado tree leaves brown tip

Just the tip, but come as new leaves have the same task in a week or two. The tree is about 6 inches tall and very comprehensive, but each piece has a brown tip about 1 / 2 "was planted in the soil for more than a year and has grown a lot. This is the new months. I live in the vicinity of Los Angeles. Ideas?