Manure and compost in the fall, and a few nutes. That's what I do. Pots get Super Soil, but no more outdoor pots for me. That's what the ground is for. You don't need anything sepcial to grow pot. We have two volenteres here. One growing out of last years compost bin that's about 8' tall and one Christmas tree looking one skinny but loaded with bud about 6 feet tall growing out of the fire wood stack. I didn't do that much to the soil in the gardens, but it was ready to go in the spring.
In short, if vegis grow in your garden pot should grow there, too. There are a lot of unnecessairy things done to raise pot. It's like everyone thinks they have to grow show room quality bud. Feed it and keep the bugs off and you should do just fine in native soil.