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Cal mag; bad guess or actual knowledge? soil grows using plain tap water

From the short time being on here I’ve noticed the same thing. Seems like a lot just jump to cal mag. Me being a new grower I always jump to PH and ppm and go from there. Like you guys said you fallow the feed chart it should have everything it needs. Normally it a PH or environmental (roots or air )
 
So are you saying recommending cal-mag is not a good blanket statement due to lack of knowing how much calcium is already contained in the tap water?
I really have never seen someone recommend routine run off measuring on here. Only durring deficiencies. So I am not really following there. Maybe it happens, but not as often as cal mag recommendations are happening from what I am seeing.
Also, I think the point was if magnesium is already included in the diet, would you recommend cal mag to correct potential deficiencies with out first asking about PH.
 
Yes, but not only the tap water-but also, what's contained in the medium.

With regards to magnesium in the diet, would I recommend cal/mag to correct potential deficiencies? is a bit more complex: IMO

Magnesium is a mobile element lending itself to the plant where it is needed and a certain amount of repair can happen if caught soon enough.
Calcium is immobile and once the damage begins you can only hope to prevent future issues, by providing constant availabilty.

A timeline from my experiences have been Magnesium deficiency earlier and later in a grow compared to Calcium, so you could end up giving both nutrients when only one is needed- if you give Cal/Mag for magnesium issue.

When I see people state Cal/Mag it's usually a magnesium deficiency, so I'm not certain I would give Cal/Mag (depending on the stage of the grow).

Treating anything without knowing what it is - is a waste of time/money and a quick pH check helps determine if it's an uptake issue or not and I wouldn't add more Magnesium if already provided without checking the pH.
 
Agreed. One thing to keep in mind is that not all cal mag is created equal. Some contain nitrates (which may need to be avoided in late flower) others contain sulfates... which bond to the calcium making the calcium unabsorbable for plants.
 
Well said pharma I was ph stupid for a few grows got a good pen and paying attention pays off huge. I've posted before I've found that at week 2 to 3 of flower I give a dose of humic acid and cal mag to help break down any left overs in my soil. I found that puts the plant in a good place to finish easy. I'm all fish emulsion (shit) for veg. The rest is only molasses and liquid bat turds only 1 time a week rest ph water. I've noticed such a change in simple low nute grows might b less yield but tighter buds and way better quality. Its so interesting reading all the different ways we all grow.
 
I ordered all greenleaf nutes...they have 13% nitrogen in their cal mag. And even growing in coco.... i dont see why they did this. The base nute, megacrop, has 10% nitrogen
sounds like toxicity waiting for me lol i wont use it. I use botanicare cal mag w/ iron.
 
My experience with salt based nutrients always led me to the same problem. Never being sure of what the problem actually was; pH, deficiency, toxicity, etc. I hated fighting that crap. Went to more of a natural approach and all of those problems disappeared. In the 2 years I’ve been doing organic I’ve never had pH problem or deficiency or had to add anything like cal mag. The line I use have plenty of calcium to feed the soil.
 
Lol. I agree to a point. I use salts, always used under the recommendation. Never PH adjust. Only time I ever experienced a deficiency (or any of the issues detailed above) is when I started PH adjusting. Now, I know that the low PH of my feed neutralizes the high PH of my tap water. So in the end, my run off is consistently 6.5 with out any adjusting necessary.
 
I use Foliage-Pro because it's levels of calcium and magnesium, in solution, in the correct ratio, negates having to use a supplement. I grow autos only and haven't used a drop of my GH Cal-Mag in 3 years. Someone will get a 'purt near full bottle at the estate sale I reckon.
 
After another night of the old Cannabis research found out that amino acids goes with cal very well and helps transport into plant cells at about 1000x the rate with out. And I sure most probably all ready knew that but found me something else to spend money on. I thank I’m going with the RAW brand of it
 
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That's a great choice! You can use just that and/or their Grow formula through the entire grow.
A little history.

Dyna-Gro would answer requests for a "bloom" nutrient by saying it wasn't needed- but the mass marketing machine had convinced people it did.

The company got so tired of answering - so it basically made up a Bloom solution do to popular beliefs which stopped the calls,lol
It is a non salt formula and can be used in all types of grows without a need to flush.

I did however, get Magnesium deficiency with my first grow of photo's.

Here is an interesting study comparing it with others: https://www.thcfarmer.com/community...-side-by-side-testing-i-have-ever-seen.73074/
 
Lol. That’s funny. So producing a useless chemical was more cost effective than providing actual answers about the subject on the phone. Classy move on their part. Hope they are not too reliant on their customers purchasing their products. Lmao.
 
Good reading ! You learn a little bit more each day in pursuit of the ultimate Grow! After my Gold finishes I will try the Earth Juices Line and see how things go. Just for the time invested in the study/test and that I use FF nutes and grow in soil. This is what makes growing so interesting !!
 
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