can I get macronutrients from a terrestrial plant mix in stores?
Before you tell me that it's much cheaper to buy powdered macros separately, it's not. I live in canada and shipping costs are more then 100% of the cost of the items. It's cheaper for my to buy a store mix. That being said, what would be a good mix to get that's widely available? Or what should I be looking for when I look at store mixes.