I’m still trying to wrap my head around what PPMs mean and how I should be measuring them. I’m growing in soil and using FF nutes. When I add the amount listed on the schedule based on the week I’m in, the PPMs measure around 600, but the schedule says they should be 1750-2100. So does that mean I need to add more nutes until I get to that number?
I’m not using every single product listed on the feeding schedule, so that could be why. My plants are looking good - no deficiencies apparent, and no nute burn. Am I underfeeding them if I don’t add more nutes to bring up the PPMs?