Does anyone put epsom salt in the water you give to plants or foliar only?

[the123321]

I am growing with biotabs dry amendments in coco. I am following the biotabs just add tap water guide at this link.

https://biotabs.nl/pdfs/organic-growing-manual-en.pdf

I use tap water that I put ascorbic acid vitamin c powder in to remove the chloramine in the water. I keep having what looks like magnesium deficiency in plants. I am not posting images of the plants in this post or asking about why the plants have problems I am only asking about epsom salt and how best to use it. I do not use calmag as the dry amendments in the biotabs are supposed to have what it needs for that. I have some epsom salt and I have tried doing foliar feeding a few times and it does not look like it is really working. I have looked online and it looks like most of the pages talking about using epsom salt for magnesium deficiency talks about spraying it but I would like to know if you can put it in the water you use when you water the plants on there.

I have 2 plants on day 22 that I water with only water and I give each like 1 half liter to 1 liter per day per plant. Would you recommend putting epsom salt in the water like 1 time per week or do you think foliar is better and how often would you foliar feed it to clear up magnesium deficiency on there?

 

[GeorgeCloney]

The first sign of Mg def. Is purple stems.
The secondary sign is twisting leaves.

Adding Mg to your regular feed cycle is only necessary if these plant signs start..
The reason being, to fix one problem you will create another if you over do it with the Mg.
This being said, providing you have an EC pen.
I'd start my water mix with 50-70ppm of epsom and top up to 500 ppm of your regular nutes.
When purple stems stop in 1 to 2 days.
Back off future Mg to 30 ppm and monitor your plants reaction.
Overdoing it with Mg will cause a nute def with Calcium.
So go easy and you'll be fine

 

[Mañ'O'Green]

I see so many bio-tab grows with problems? Yes you can use Epsom salts in the coco but are you sure that is what you need. If you get your pots "out of Balance" you are in big trouble trying to get it back because you cannot just flush boi-tabs out - well unless you hose it out and do a complete recharge.

By the way one application of foliar magnesium should have made a difference if that is what the plants need.

 

[GeorgeCloney]

There is a lot of hype and paranoia in the grow circle online

People need to relax about this.
Lower leaves start to spot, and those same leaves are still there at harvest.
Slow and easy correction is always the best approach
Be over generous with one, and the other is over abundant.