What are the key symbols in Freemasonry related to nature?

The primary natural symbols in Craft Masonry represent immortality, abundance, and the fruits of human labor.

The sprig of acacia, an evergreen, serves as a central emblem of immortality, spiritual survival, and faith 1. Derived from ancient shittim wood—a sacred timber noted for its persistence—its enduring greenness represents the conviction that divine life cannot die 1.

Corn, wine, and oil constitute the symbolic wages of a Fellowcraft, representing sacrifice, earned reward, and spiritual nourishment 3. Corn—referring broadly to wheat or barley rather than modern maize—signifies abundance and the essential staff of life 342. In lodge iconography, a sheaf of grain suspended in the south reinforces this idea of plenteousness 2, while the word shibboleth links an ear of grain directly with abundance 3. Wine represents gladness and refreshment, while olive oil symbolizes joy, sanctification, and healing consolation 342. In Masonic processions, corn is carried in a golden pitcher to denote its status as a primary necessity, whereas wine and oil are borne in silver vessels as emblems of comfort 2.

Plant life also features in the lodge's sacred architecture. The two brazen pillars positioned at the entrance of King Solomon's Temple were topped with lily work and chains bearing pomegranates 3.