companies who make garden soil

Question

Why do companies who make garden soil not recommend them for container gardening? I have been doing it for years and adding cow manure to the mix.

Answer 1

Here is a good article that succinctly explains the difference between garden soil and potting soil and why garden soil is not conducive for pots:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/types-of-potting-soil.htm