Im about to start using Athenas blended line in my soil grow. From the information ive gathered from their website and social media, It will still work well in soil. If not using RO water Balance will not be necessary, save your money. On their website you can find their feeding schedules, Id recommend going with the light feeding schedule. If you're using a hot soil, such as ocean forest, id recommend going even lower as their feeding schedules are designed for coco/hydro. Maybe 1/2 to 3/4 strength? Im not 100% sure of optimal concentration for soil but I am sure that this brand will give you better results than most others. After looking in to the company and R&D team, their fucking legit.