In “Image” no. 13, Edwards sees the beauty and benevolence of Creator God and his Spirit and profound typological significance in grass and other flora:
Thus I believe the grass and other vegetables growing and flourishing, looking green and pleasant, as it were rejoicing, blossoming and bearing fruit from the influences of the heavens, the rain and wind, and light and heat of the sun, to be on purpose to represent the dependence of our spiritual welfare upon God’s gracious influences and the effusions of his Holy Spirit. I am sure there are none of the types of the Old Testament are more lively images of spiritual things. And we find spiritual things very often compared to ’em in Scripture.
Edwards’s text courtesy of edwards.yale.edu.