E Komo Mai. Welcome!

The University of Hawai‘i Lyon Arboretum and Botanical Garden is the only university botanical garden located in a tropical rainforest in the United States as well as the only easily accessible tropical rainforest on the island of O‘ahu. The arboretum consists of almost 200 acres at the top of the Manoa watershed with a set of small cottages and greenhouses used for research and community education about plants and the natural environments of Hawai‘i.

                                    Support Lyon Arboretum's School Programs by dining out at CPK Wednesday, April 9.

                                    Read our latest newsletter.

                                    Listen to Hawaii Public Radio's story about the Arboretum's Micropropagation Lab.


*Arboretum will be CLOSED FRIDAY APRIL 18TH for the Good Friday Holiday*