The idea for crushing up volcanic rock and sub irrigating coco organically came from Maui itself and it’s history of red soil.
I really want to bring out something authentic. There is an old story of really dank sweet potatoes coming off the island of Maui - and if I had to guess it’s where they were hiding some fire.
"On the islands of Kaua’i, O’ahu and Moloka’i, the principal crop was taro – a starchy plant grown in irrigated wetlands where the supply of water was usually abundant.
But on Maui and the Big Island of Hawai’i, the main staple was the sweet potato – a more labor-intensive crop planted in relatively dry fields where success depended on adequate seasonal rainfall."
“strong evidence that the early inhabitants of Kohala had discovered a “sweet spot” of high soil fertility - a swath of land, rich in phosphorus and bases, which received enough precipitation to harvest vast quantities of sweet potatoes.”
So I broke down authentic volcanic rock and amended my soil with it ; keeping in mind the acidity of my situation I amended along with a bunch of good things coming only from the ocean.