Premixed Fertilizers

Unexpected

Active Member
May 7, 2023
281
370
Albuquerque
Why do so many commercially available liquid fertilizers add Mg to the mix?
Is there not enough from GH alone?

Should I be dosing additional Mg if my Mg is 8ppm from my GH?
 
The ratio of Ca/Mg is far more important than the actual quantity, provided that you at least have a little. Somewhere around 3:1 or 4:1 is about right.

Why do they add it? Most likely because it's dirt-cheap and almost never hurts anything.
 
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