The nature of the soil is especially important for indoor plants because …………

It has long been recognized that the vegetation differs
according to the nature of the soil: some plants grow in
one place but not in another in spite of all the care with
which they are surrounded. This explains the need to
give indoor plants, not just any sort of soil, but one
which best suits their requirements. Since their roots
are not free to grow out .into the earth in search
nourishment and must be content with the restricted
space bounded by the sides of the pot, one should
take care that tills soil nourishing.