The color green is almost exclusively used in connection with plants in the Bible, and the meaning is closely connected to the meaning of plants as well. Plants, in general, represent facts, knowledge that we can gather from the world. Green plants are ones that are alive and growing. Since life represents love and goodness, it makes sense that green plants are facts that have the potential for good use. It also indicates that they are the kinds of things we learn through directly through our senses, since to identify green plants we need to actually see the greenness.

(References: Apocalypse Explained 507; Apocalypse Revealed 426; Arcana Coelestia 7691)

'Herb bearing seed,' as mentioned in Genesis 1:29, signifies truth in terms of its use. (Arcana Coelestia 57) Every herb in the Bible signifies some type of knowledge.

'Green herbs,' as mentioned in Genesis 1:30, mean food for the natural man.

'Eating the herb of the field,' as mentioned in Genesis 3:18, signifies that a person should live as a beast.

'Herb of the field' signifies spiritual truth.

(References: Arcana Coelestia 7626)