• EHI demo plot corn
  • EHI demo plot construction
  • EHI demo plot tomatoes
  • EHI demo plot out planting


East Hawaiʻi Master Gardener Helpline

If you are a homeowner and have a horticulture question or request Master Gardener services in East Hawaii, please contact the helpline:

Days: Friday
Time: 9 am to noon
Phone: (808) 969-8203
email: himga@hawaii.edu

Komohana Research & Extension Complex

875 Komohana St.
Hilo, HI 96720 

East Hawai'i Master Gardener Links

East Hawaiʻi Master Gardener Coordinator

If you are interested in becoming a Master Gardener or have administrative questions, please contact the Master Gardener Coordinator:

Russell Galanti
Komohana Research & Extension Complex
875 Komohana St. B-101
Hilo, HI 96720
Phone: (808) 746-0910
email: rgalanti@hawaii.edu

The Master Gardener Helpline

Hawai‘i Island Master Gardeners are trained volunteers who specialize in giving advice and assistance to home gardeners on pests, diseases and cultivation of plants in Hawai‘i. Research-based horticultural information is provided primarily through the Master Gardener Helpline. Home gardeners can call during office hours and ask to speak to a Master Gardener or drop by the office in person.


Beginning August 27, 2021, in-person visitors to the Komohana Research & Extension Complex will need to show proof of COVID-19 vaccination, or a negative COVID-19 test within the last 7 days.

Helpline Hours

Fridays: 9:00 am – 12:00 pm


Komohana Research and Extension Complex
Cooperative Extension Service
875 Komohana Street
Hilo, Hawai‘i  96720

Phone: (808) 969 8203
email: himga@hawaii.edu