First of all, I would not recommend a "Little Cado" avocado. The tree produces very marginal fruit quality. If you want a small dwarf type tree...I recommend the "Holiday". It stays small, and the fruit is huge and delicious. If you have any "opposite" pollinator within a couple blocks you will be fine (see "A" and "B" pollinator varieties).

Thank you for telling me this! But holiday is type A, I can't find any dwarf type B s

where do you live?

Zone 9, nevada

I'd be very careful about tackling an avocado. I'm in prime avo area and I've lost 3 because they're so temperamental. Too much water, too little water, too hot, too cold, etc. And the root rot. ugh.

So I'd see if anyone else in your area is growing avocados and then plant what they plant. Many have hard lower freeze limits. Mexicola is probably the most cold hardy, safe down to 18 degrees. Bacon is safe to 23.

Here's a list of available cali avocados: http://www.backyardavocados.com/varieties-of-avocado-trees/