Superlative form of earthy: most earthy.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "earthiest" in a sentence
"“Robicheaux remains one of the coolest, earthiest heroes in thrillerdom.”"
"This is why I love my husband: given these opposites to work with, the earthiest of roots and the most exotic of fruits, he sees harmony, not discord."
"This hot, urgent quaking, this most unexpected onslaught of the earthiest of passions, was like nothing she had ever in her life expected to feel, and to her own amazement she discovered she was now completely powerless to resist."