Form is his thing: Take something raw and transform it into beauty. Conform nature to his aesthetic taste.
Forging iron captures the creative energy of fire and iron.
Peter similarly transforms soil, seeds, bulbs and sun into a colorful palette of nature in his flower gardens. He forms his gardens like he forms his iron, with creative deliberation.
Very colorful dahlias and day lilies thrive in the South River bottom land.
He simply loves the color, the beauty and the creative expression. [Probably also another way to get his hands dirty!]