The only real disadvantage to growing potatoes in containers is you have to be more vigilant about watering, as container soil dries out faster than the ground.
Timing for planting potatoes in containers is not much different from planting them in the ground.
The process for growing potatoes in containers, grow bags, or the ground is a little different than it is for other vegetables.
When growing in containers, the hilling process looks a little different, but the basics are the same. When first planted, the seed potatoes are just barely covered with soil.
As the plant grows, additional soil is heaped around the plant at regular intervals until the container is filled.