A Masonic connection to Evergreen ? The Acacia Tree ? A sprig of acacia, considered by Freemasons to be a holy plant because Moses supposedly built his ark, the tabernacle, the ark of the covenant, the table for the showbread, and the rest of his sacred furniture out of the wood of the acacia. To Masons, a sprig of acacia stands for the immortality of the soul, and it reminds them of such because of the acacia tree's consistent evergreen nature.
And perhaps another twist on the immortality meaning is the possibility that it also stands for "life rises out of the grave," a lesson that everyone can glean from plant life everywhere.
https://www.ranker.com/list/common-freemason-symbols/jacob-shelton