Originally Posted by modenacart
Only problem I have is all the seedling I am growing are from seeds from the grocery store so most likely they will be sour.
Most citruses, especially oranges come true to type. Yes they will be sour in their first three years of fruits, but then again, they will improve dramatically on the seventh year of fruits if from seedlings.
What you can do to speed things up is to do a combo T-bud and bark grafting on those seedlings. You can get scionwood from many members here too, who are citrus afficionados.
Here's my citrus bark-grafting tutorial which perhaps you have seen already:
Citrus Growers Forum :: View topic - Citrus Bark Grafting Tutorial - the Real deal!