Do I think Tertullian was what we could consider Green by today’s standards? I don’t know – who cares? He was advocating using nature for what God had intended – and not to worship false gods in false ways. Neither did he want people to use it to worship God in a false way.
As we join Tertullian, he is dismissing strongly the use of ‘crowns’ on Christian heads – material, not spiritual – because they are of pagan invention. For him, just leave the flowers in the field where they belong. (Take him in context)