Historically, the Highline area was dotted with small farms, orchards, and dairies. However, due to extensive urbanization and the continuous expansion of the airport since the 1940s, commercial agriculture is no longer a part of SeaTac's economy.
Today, agricultural activity is limited to residential gardening and community garden plots. The Highline SeaTac Botanical Garden serves as a horticultural hub for the community, preserving several heritage gardens that were saved from neighborhood demolitions during airport expansions.