some good advice on avocados It is normal for MOST of the tiny fruit to fall soon after blossom, but you should have some set and stay on. I am a huge believer in mulch for fruit trees, especially shallow rooted ones like citrus and Avo's. It keeps soil temp cool, acts as a buffer for water so the soil doesn't have such big swings of too wet to dry between waterings, it feeds the full spectrum of nutrients as it decomposes, it helps healthy soil horizons develop, just to name a few of the best reasons. All of these things help the tree grow healthy and strong and so better able to carry good fruit. Put about 6 inches of mulch under the tree and extending out 2 feet past the drip line. Pull back a little away from the trunk fro several inches, so you don't get rot at the base. Water it down so that it will stay in place. Add more each year so that you always have at least 2 to 3 inches covering the soil. Remember mulch is a slow process, just like trees are slower than squash, so mulch is slower than chemical fertilizer. You won't mulch on Monday and see this huge bunch of fruit this weekend. But a good mulch builds a good soil that supports a good tree. You will see real results over the next few months and I would guess good fruit next season. One last thought, there are A and B flower Avo's. One of each is not needed for pollination but it helps. Still, in LA there are lots of Avo's in lots of yards, so there may be other trees close enough to help with pollen.