Coffee in Fern Forest?

[Rene Siracusa]

I am at 1,200 ft. elevation above Pahoa and have coffee that was naturalized in an ohia forest - unripped. I don't feed them and I can't keep up with the growth/production. I try to prune back as often as necessary, but that's not often enough. They do like the shade. In the Solomon Islands they are grown at sea level under the shade of coco palms on their copra plantations, and are a cash crop.