I'm not sure if this will help but I use Neptunes Harvest products on all my gardens. It's a local company in Gloucester, MA but they do have a website: neptunesharvest.com. I believe they ship anywhere and have specific info for farmers. We used to get it in big vats and mix it up from the back of the truck but now that they've gone mainstream it's easier to use, which is good since it smells nasty(!).