Don plant roots take food in directly?
Not really. Think of a plant as a baby bird. A whole worm may be great for Mrs Bird to eat, but she has to chew it, mix it with enzymes and pre-digest it before the baby birds can utilise it. In other words, she first transforms it into perfectly balanced baby food. Bugs do the same thing for plants. While they are chewing however, The Garden Answer gives them immediate energy and nutrients.
