Here is a list of non-profit organizations and websites I recommend

Farm Center – Kohala based Agroforestry educational facility focusing on Syntropic Agriculture methodologies

Hawaiian Reforestation Program – Mauna Kea based Native Hawaiian forest restoration project focusing in Palila Critical Habitat on Public State Lands

Malama o Puna – Environmental education facility promoting local needs

Keau‘ohana Native Forest Restoration – Puna forest restoration project focusing on the only remaining native lowland forest in the state – Incredible resource bank and educational organization focusing on Pacific Island agroforestry – many many free publications available