Magnesium level in feed

Hi!

I've read that cannabis grows best with 50-75ppm of magnesium in water. I realized my water has only 6ppm, most brands have these amounts only in very high ec levels. Do you guys suplement with pure magnesium/epsom salt all the time or only when deficiency is showing?
That's the article:
research-optimal-rates-for-magnesium-in-cannabis-cultivation

Please don't ban me. Im really interested in this topic. And I got banned on another account today for the same thread where I did all the math, counting ppms high as fuck

IIRC, the Lucas formula uses 60ppm Mg. generally you want 2:1 Ca/Mg too.

using epsom all the time since the switch to jacks both 321 and RO mix, except last 2 weeks using straight part A ... that supplies no Ca and half the normal N, plus tuns of micros ...plenty of sulfur .. .
we will see.. 4:2:1 K:Ca:Mg is what i've seen...

I think the best formulation I have found that doesn't require Calcium or Magnesium supplementation using RO water or very clean water is Athena's Pro series. Lots of cal & mag already in the CORE. With MaxiBloom and Jacks I had to supplement CalMag due to lacking factors.. This all is based off starting water though, I use heavily filtered water with nothing in it, so this will make some base fertilizers not good enough.

1.2g of Epsom salt per gallon with every water change. I do jack's 321 as well. If they are super hungry, I might supplement with some cal mag. I cut the extra off at 2 weeks before harvest.

bles said:

Hi!

I've read that cannabis grows best with 50-75ppm of magnesium in water. I realized my water has only 6ppm, most brands have these amounts only in very high ec levels. Do you guys suplement with pure magnesium/epsom salt all the time or only when deficiency is showing?
That's the article:
research-optimal-rates-for-magnesium-in-cannabis-cultivation

Click to expand...

That article is great and a good anti bro science reference. I've saved it to take a look at every so often to make sure I have my profiles correct. Once you see how easy it is to hit 75ppm, you can imagine the HUGE amounts of Mg people have been dumping into their reservoirs, grow beds, foliar feeds all based on hearsay.

a little offten works best, you can allways add more, you cant take it away. less is more dont forget that calcium and magnesium work together when suplimenting your grow