why does 420 magazine say this
I would like to offer a ppm chart as a rule of thumb or ball park target ppm, but each grow or garden is going to be different.
These numbers are based on EC readings, .500 readings, TDS readings converted from EC or the common Hannah Chart:
Seedlings, Early Sprouts 100 to 250
Early Vegging 300 to 400
Full Vegetation 450 to 700
Early Blooming 750 to 950
Full Mature Blooms 1000 to 1600
(this excludes the ppm of your water)
20 to 150-200 seems like a big difference to me, thats why im having such trouble figuring out whether Im giving too much or too little
+rep to the first mofo to explain this to me!