that depends on hydroponics, where you feed almost from the beginning or soil where the nutrients are already in the soil. Coco and rockwool have no nutrients at all. Soil is a complex blend of microbiology as you know (Most modern soils are just JACKED with nutrients!!) You know why they call it Ocean Forest? it has crab meal, shrimp meal, fish emulsion, oyster shell for aeration, kelp also has worm castings and bat guano so its loaded with nutes