I have a seedling now what?

My very first fruit tree is a little apricot seedling I started from a seed...  it is currently happy in the little 12 ounce cup but I know it will need a bigger pot soon...  
Eventually it will go in my front yard as the foundation I will build a guild around but for now it is a tiny plant.  We don't have a deer problem in the area but the local pronghorn population does wander this way sometimes and DH has problems with seeing small trees so I think I will just keep potting it up until it is big enough to survive either pronghorns or lawnmowers.

I've had nice success with starting apricots from seeds. Yep, just keep potting up until it's big enough to go outside with protection from mowing and pronghorns. Maybe one or two more years?