No this is all outdoor. I have only shot 1 indoor garden. The color in most of my shots is genetic but sometimes we get a colder spell at the end of the season and get some darker colors. Admittedly if u look up every thing we use I'm sure u will find some small salt base but we try actively to reduce carbon footprints and steer clear from ALL chemical based pesticides and harsh nutrients to the best of our ability..but I mean we r growing big ass plants outdoors and that always has its own set of problems and troubles...so we do what we have to but try to do it as clean and free of crap as we can