Watering in nutrient soil using RO water is CalMag still needed?

[Ironmike340]

I just transplanted in happy frog soil it’s full of nutes. So do I need to use cal mag with my reverse osmosis water? I ph it to 6.0. But not sure if I should use straight ro water or add the cal mag? I added cal mag and ppm in water was 190 ppm?

 

[Old Salt]

Only add cal mag if your plants show a deficiency. If you give it to them, and they don't need it you run the risk of toxicity and nutrient lockout.

 

[Chris Scorpio]

I'd use the calmag at full dose which usually is 1t per gallon

 

[Chris Scorpio]

Or not

Lol

10 peeps ya get 47 answers

Lol

 

[George Mc]

I just transplanted in happy frog soil it’s full of nutes. So do I need to use cal mag with my reverse osmosis water? I ph it to 6.0. But not sure if I should use straight ro water or add the cal mag? I added cal mag and ppm in water was 190 ppm?

Your pH is too low. shoot for 6.3 and 6.8, bouncing between them a little bit

 

[Ironmike340]

Ok but I’m confused?
If your using tap water it’s roughly already 200 ppm or more.
With reverse osmosis it’s 4ppm I was under impression it would suck plants dry and you always need it in to water

 

[Old Salt]

Rainwater has very low PPM as well. The garden loves it. There's another thread where a member explains it. I'll try to find it for you.

 

[Ironmike340]

Ok but rainwater has more than ro. Mine has nothing. I know the soil has nutes but why can you use well water but not ok to add. Man this gets confusing I get did answer everywhere I go. Lol

 

[Old Salt]

Here's the link. Bob Brown and Emilya give some great insight into how plants growing in soil get their nutrients.

 

[Chris Scorpio]

When I'm growing in soil and Hempy I use calmag

Soil like every other watering

It's worked well for me

There is no ONE all inclusive way to grow in any medium, so pick a path, go with it, adjust if problems occur

Issue will arise, even with the best growers, ya just adjust to what is needed, if yer not sure, ask and I'm sure we can help