I recently visited Opala Farms in Kaneohe and learn about growing pink and white oyster mushrooms! They take coffee ground and make delicious mushrooms from them! They also sell very nutritious compost ($10 for 5 gallons) from the medium which they grow their mushrooms! I met them at the Kaka’ako Farmer’s Market . They sell their products there (including a delicious mushroom jerky) as well as on Oahu Fresh and Farmland. Check them out!