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)

341. Verse 13. And every created thing that is in heaven, and on the earth, and under the earth, and those that are in the sea, and all that are in them, heard I saying, Unto Him that sitteth upon the throne and unto the Lamb, be the blessing and the honor and the glory and the might unto the ages of the ages.

13. "And every created thing that is in heaven, and on the earth, and under the earth, and those that are in the sea, and all that are in them, heard I saying" signifies the acknowledgment and consequent glorification of the Lord by the angels that are in the lowest parts of heaven n. 342; "Unto Him that sitteth upon the throne and unto the Lamb" signifies the Lord in respect to Divine good and Divine truth n. 343; "blessing" signifies acknowledgment, glorification, and thanksgiving that all good and truth, and thence heaven and eternal happiness, are for those who receive (n. 344); "and the honor and the glory," signifies that to Him alone belongs every Divine good and Divine truth, and therefore, every good of love and truth of faith, from which is all the wisdom and intelligence that angels and men have (n. 345); "and the might unto the ages of the ages," signifies that to Him belongs omnipotence to eternity (n. 346).