Loam holds nutrients and its texture lets it retain water long enough for plant roots to access it. It also has good draining qualities meaning that the water eventually seeps away so that plant roots do not sit in water and rot. Without quality soil, plants struggle to survive and usually require supplemental feeding and watering.
Loam is soil made with a balance of the three main types of soil: sand, silt, and clay soil. As a general rule, loam soil should consist of equal parts of all three soil types. This combination of soil types creates the perfect soil texture for plant growth.