The oak tree has long been associated with representing marriage due to its symbolism of strength, endurance, and stability - qualities often desired in successful marriages. Oak trees are known for their deep roots that ground them firmly in place, much like how marriage provides stability and support for couples throughout their lives together. Moreover, oak trees are also seen as everlasting with their ability to live for hundreds of years, symbolizing lifelong commitment and love in marriage. Therefore, many couples opt to incorporate oak leaves or imagery into their wedding decorations as a nod to these meaningful associations with marriage.