Sadie Seymour Botanical Gardens, Botanical garden in Kailua-Kona, Hawaii, US.

Sadie Seymour Botanical Gardens is a terraced garden in Kailua-Kona, Hawaii, arranged on sloped land with plantings from different world regions. The collection features species from Hawaii, Central America, and other areas organized in distinct themed sections throughout the property.

Sadie Seymour (1907–1975) founded the Kona Outdoor Circle to beautify the Kona community. The gardens were designed by landscape architect Scott Seymour on a wedge-shaped plot and named in honour of his mother. They occupy the grounds of the Kona Educational Foundation Center on Kuakini Highway in Kailua-Kona.

The gardens honor Sadie Seymour (1907–1975), who founded the Outdoor Circle to beautify the Kona community; her son, landscape architect Scott Seymour, designed the wedge-shaped plot. The Kona Educational Foundation Center on the grounds holds a horticulture library and hosts tropical gardening classes and other events.

The gardens lie on the grounds of the Kona Educational Foundation Center at 76-6280 Kuakini Highway in Kailua-Kona, and admission is free with donations accepted. They are open daily except weekends, so plan a weekday visit. The Kealakowaʻa Heiau can be viewed from the center.

Kealakowaʻa Heiau, named "temple on the way for dragging canoes," was built in the time of King ʻUmi a Liloa and stood along the Holua Loa trail from the upland koa forests of Hualālai to the royal complex at Holualoa Bay. Canoe logs were rough-hewn in the forest, dragged here for blessing, then sent down the slide to the water for finishing and launching.