with nano iron for maximum yield potential  Nano iron is the active ingredient in Nano 10-9 flower boost+

An all-in-one PK flower enhancer, with nano iron for maximum yield potential 

Nano iron is the active ingredient in Nano 10-9 flower boost+, used to speed up the plant’s metabolism. Iron is directly involved in chlorophyll production (which makes your leaves green) and this directly improves the plant’s ability to use the light as energy.