Bought mine at Green Thumb in Van Nuys 5 years ago. FInally has fruit this year. I think I made the mistake of under-feeding it so it basically starved all those years. This year I used Citrus-Tome (found it at Home Depot or OSH) and it may be coincidence but it's now bearing fruit-- big, beautiful, luscious green avocados. Can't wait to harvest! The tree has grown to about 12 feet with a nice umbrella spread of branches. I spread half a bag (1.5 pounds) of Citrus-Tome under the tree on top of the dead leaves every month and water it well. Leaf drop is minimal since I started feeding it and I see new leaves and branches all the time. Admittedly, I don't know much about growing avocados but this has turned out well for me. I think I paid $29.99 at Green Arrow and had one of their Gardener Club coupons.

I'm not sure where you are in the Bay Area. I buy all my soil and compost from Wheeler Zamaroni in Santa Rosa. I filled my beds with their "veggie mix" soil. This year, I've amended it with their Compost Plus compost. Have been extremely happy with both. There's also Sonoma Compost company in Petaluma where friends have bought their Mallard Plus compost to amend their in-ground garden beds. And I know of another one in Santa Rosa but can't recall the name. They sell Mango Mulch which is supposed to be very good (Renee?). Here is a link that might be useful: Loribees Garden Blog

With most avocados, you need two plants (a type A and a type B) in order to produce fruit. This basically means they need cross pollination from another variety in order to set fruit. I am guessing you have a Hass avocado which is type A. Type B cultivars that can be used with this variety are Fuerte, Zutano, Bacon, Whitsell or StirPrize. Your pot seems awfully small. Any chance you have room for it in the ground? It probably would be much happier. If I were going to plant it, I would cut it right before it changes from the darker green color to the yellow green color (based on your picture). If you need to keep it in a pot, I would get a bigger one to put it in. A good book to reference is the Sunset Western Garden Book, which has quite a bit of detailed information regarding Avocados. Most libraries have this book, so it is worth checking it out.

I am in Sunset zone 15. I didn't think I had any tiny fruits, but after you mentioned it , I took a closer look and think I may have a few. Does this means they are being pollinated, but still worth getting another tree to increase the chances of more fruits, or is there something that can be done to help with the growth/prevent drop of these precious few fruits? Thanks!