Avocado tree

is it grafted or grown from a seed?

Avocado is a tropical. You are going to have a tough time getting significant fruit in BR. It's similar to trying to grow lime or guava. You will need to mitigate cold in the winter as much as possible.

They also have very unusual pollination/reproduction. You will need other trees in the neighborhood if you hope to get significant fruit set.

The lady that became my wife lived in Arabi and had a neighbor who had 3 large avocado trees on his property, two of them along the fence that separated their property.

They produced tons of beautiful avocados every year until Katrina took them out.

It really was a shame the old guy lost those trees since he was so proud of how well they produced.

I always heard you needed two but it seems that is not the case. But it is true that certain mechanisms of how the trees bloom seem to make it more likely to occur if you have multiple trees. Also 7-10 years until you get fruit from what I gather.

https://www.agric.wa.gov.au/spring/growing-avocados-flowering-pollination-and-fruit-set#:~:text=In%20general%2C%20on%20a%20single,%E2%80%94%20known%20as%20self%2Dpollination.



Here is an interesting article, apparently avocado trees are just difficult even with other trees.

https://www.sciencelearn.org.nz/resources/73-avocado-pollination

And a youtube video loaded with info about why most avocados don't self pollinate and how to help self pollination.

https://www.youtube.com/watch?v=8jdMMjZjI6g

Another video with good scientific info. You sent me down a rabbit hole

https://www.youtube.com/watch?v=Dympgswc2Pc

Avocados attract tree rats.