Of course it is possible to plant a small chiliplanta in a large pot with plenty of Earth. There are a few things that you should keep in mind. A big pot is a lot of water and it is important to water the right way for success. The Earth becomes too wet, the small roots are injured and die plant. Here I use a 20 liter pot.
Azomite and Epsom salts (magnesium) and Bat Guano can be found here.
See the movie here how I plant a little chili in large pot.