You can buy ready prepared potting compost which is the same thing.
One can buy potted trees and flowers at a market which specialised on plants. There are also many different small shops that sell plants. Also there is the possibilty to buy plants on the internet.
There are many places to buy inexpensive potted plants, the best place to get these would be your local green house. You can also look at a garden section at your department / grocery store.
potted plants they came over in potted plants
No, Humus is made from dead organic plants and animals.
Yes, you can definitely get potted plants at a florist. However, the type of potted plants you want might not be available at a florist so it would good to look up some online too.
Both humus and minerals contain nitrogen for growth of plants. Alluvial soils are rich in humus and minerals making them good for growth of plants.
plants and humus
Humus
Yes it is possible because I have seen a number of snails licking the water from the leaves of my potted plants a number of times.
The Fertile soil contains lots of microorganisms which decompose the complex dead bodies of animals and plants into simpler substance called Humus.
Animal feces and dead plants that are decayed can become humus.
plants are organic