I'm no avocado expert, but I started one like that, and just let the tap root circle. Eventually I potted it in well drained potting soil / perlite mix and put it in a partially shaded planter on a drip system outside. This spring it got planted in full sun, in ground. It lost a few leaves, looked around, decided it could make it, and is now growing many new leaves and branches.

The variety is Zutano. We bought a few avocados from a fruit stand in Fresno, CA which has a similar growing climate to here. It will be years before it fruits, but it's fun knowing it's something we grew!

The parent fruit may have been Zutano, but seedling avocados don't match the parent, even if both parents were the same tree.

It's still fun to grow the tree. The fruit may be good, might not. If nothing else, you can graft a branch of a favorite avocado onto the young tree.

Yes, I know it's not likely to be a Zutano, and we purchased a grafted avocado, but that one never made it, so this year we'll try again.

I just walked out to see our baby Zutano, and discovered it has fallen off it's stake, so thanks for this thread. We will be tying it back today.