How to know if im feeding adequately

Im using General hydroponics flora trio and cal mag and i was following a guide for awhile but im starting to question if its actually doing anything. How can i determine how much of each i need? I need to feed today and want to make sure im doing it right doe the best yeils. 3 weeks into flower right now. Thanks


Not familiar with gh nutes, but I use a ppm/tds meter to measure nute solution and runoff.
If I need to be at 1400ppm in my soil, and I fed with 1800ppm, and the runoff is 1200ppm I know the next feed needs to be higher.


Gotta have more info. Are you soil, hydro, media? Pot size? Please fill this out. Also; what means are you using to measure TDS and PH?

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They have a feeding schedule you can find online - be careful to make sure you’re using the correct dosage for your medium.

For me I watch the leaves for stress and discoloration. I don’t do full strength due to how I water my babies.

Thank you! I add nutes every other watering so my next watering is just PH water but after that im def following this to try it.