I actually managed to get a 3 foot tree growing from an avocado seed but we moved and I lost it. Gotta start over. Apparently though, from what I researched, growing a tree from an avocado won’t yield avocados the same way avocado farms do.
Indoor Avocado Plant Care: Growing Avocados In Containers--Avocado trees are warm season plants, easily damaged by cold and frost. This article will help with growing an avocado plant indoors so the cold won't be a factor.
One of the best sites I've found for growing avocados from a seed. One note: many grocery stores are selling avocados that have been sterilized for food safety reasons.They WILL NOT germinate! This includes organic varieties.
>Basically you : Eat an avocado (fun part) Clean-off the pit Suspend it over a dish of water with toothpicks (half-submerged) Wait 3 to 6 weeks for it to sprout Simple enough, right? Now, I can't guarantee that you'll have fruit for even a year or two, bu