Kona coffee is cultivated on the slopes of Hualalai and Mauna Loa in the North and South Kona Districts of the Big Island of Hawaii. Blooming in February and March the small white flowers known as ï¾Kona snowï¾ cover the trees. By April the green fruit emerges and by late August the red ripe cherries are ready to be harvested. Hawaii is the only state in the United States suitable to grow coffee. Based on small volume produced and US labor, makes Kona one of the more expensive coffees. San Francisco Bay Kona Estate coffee is 100% Extra Fancy grade, while most Kona blends contain only 10% Kona coffee. The ideal weather conditions combined with porous, mineral-rich volcanic soil create wonderfully symbiotic coffee growing conditions.