What is the life span of cypress fence post vs treated pine?

Cypress fence posts typically have a lifespan of 15 to 30 years due to their natural resistance to decay and insects. In contrast, treated pine posts, which are chemically treated to resist rot and pests, generally last around 10 to 20 years. The longevity of both types can be influenced by factors such as soil conditions, moisture levels, and maintenance practices. Overall, cypress tends to outlast treated pine in many situations.