Question

if the growth of plants successful without soil

Answer 1

Generally soil is the medium for growing most of our plants. As stated by Giacomo Catenazzi, there are two exceptions to this norm in nature: many orchids growth without soil: they are epiphytes (they grow on other plants). Various aquatic plants growth without soil.

We can also grow plants in one of the modern farming techniques used in controlled environment in greenhouses that is called hydroponics or aquaponics. Here certain plants (not all) plants are grown in water or nutrient solution under controlled environment. Precise control of light, temperature, relative humidity, and dissolved oxygen, pH and salt level in water medium is critical for successful cultivation of plants in hydroponics.