At the heart of CANNA COGr product line are compressed unbuffered slabs of coco that require you, the grower, to soak with the special COGr Buffer Agent before you start growing. During the vegetative stage you need a special COGr Vega nutrient. During the flowering stage you need a special COGr Flores nutrient. These nutrients contain added humic and fulvic acids for improved nutrient uptake as well as silicon for increased resistance to pests and disease.