Coco deficiency?

What is this deficiency? It start a couple weeks into flower. Ppms 500 so 1.0 ec. I have cal mag at 5ml a gallon. It get worse into flower. Idk what the hell it is. Thought nute burn but def not so idk. They start yellow from tip and turn brown. Nah maybe

All the answers you need are on these threads, the ones marked with a red thumb tack "stickies".
https://www.rollitup.org/f/marijuana-plant-problems.65/

For mag defociencies, adding calcium locks out the mag even more, only use calmag if your using a ro system, other wise use epsom salts for just the magnesium as tapwater has all the calcium plants need

Use a sprinkle at the start of veg & flower

I don't use RO and I add 2-4ml of botanicares cal-mag every other week. Works great

No need to waste $$$ on calmag, you only need it if your using ro, its the mag they crave, theres enough calcium in tapwater for them, epsom salts is pennys, why throw ya money 2 the people in the grow shop. Its a con.

Dont fix what aint broke, imo you definitely need to add a little even with just filtered tap water. I have noticed small deficiencies when I haven't used it. Its cheap enough anyway.....


I use it outdoor too with creek water, plants seem to eat it up and don't show any signs of deficiencies.... 100g smart pots

Everyones tap water is different as well, mine comes out very low. I've definitely found it necessary to add it once every other week.

If only you started with the epsom salts and not the calmag youd have the same opinion as me mate,

The only time ya would need it is in a really soft water area or with a ro filter, nice plants though mate

I don't know man, I don't like the idea of adding epsom salts to my plants. Theres more in the salts than just magnesium. I know a lot of people on here do that but none of my friends use it. Cal-mag is made for plants and has iron in it as well. I also believe that plants need more calcium than whats in tap water. To each their own though, everyones got their own way of doing things that works for them. Just my personal opinion and experience, not trying to offend anyone. Good luck dude!

Just gonna say, epsom salts is magnesium sulphate, its a naturally occurring substance, water soluble and they love it in small doses

707humboldt said:

Everyones tap water is different as well, mine comes out very low. I've definitely found it necessary to add it once every other week.

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So ya in a softwater area? Taps beIng low ppm youll obviously need it lol, im in a hardwater area so epsom does me just fine

So whats the issue? What light is the op under?

wizzileaks said:

For mag defociencies, adding calcium locks out the mag even more, only use calmag if your using a ro system, other wise use epsom salts for just the magnesium as tapwater has all the calcium plants need

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Yea thats what i was said, not everyones tap comes out the same. Mine comes out real low, he should check his ppm of his tap first because it may be low as well and require both calcium and magnesium.

wizzileaks said:

Just gonna say, epsom salts is magnesium sulphate, its a naturally occurring substance, water soluble and they love it in small doses

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Yup, sulfur deficiency isn't that uncommon either...

wizzileaks said:

No need to waste $$$ on calmag, you only need it if your using ro, its the mag they crave, theres enough calcium in tapwater for them, epsom salts is pennys, why throw ya money 2 the people in the grow shop. Its a con.

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In coco it is definitely worth buying cal/mag, as coco holds nutrients such as calcium.

Soooo mag deficiency?

Josh2015 said:

Soooo mag deficiency?

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Not trying to be a dick but if you want to be a good grower and take this seriously, then you'll have to brush up on your reading. Cheers and it is the very first post of this thread from the link I already posted.
https://www.rollitup.org/t/guide-for-diagnosing-plant-problems.38772/

And yes it looks to be mag def but you'll have to read up the causes of this problem because if you're giving your plants 5ml of cal/mag every watering along with a ph balanced nutrient solution you should have no issue unless you have shitty tap/well water you're using. Too much nitrogen or something can cause mag lock out, which is what your plant maybe experiencing, also an imbalanced ph will lock out mag too. I believe, but I could be off and that's why it's good for you to check into.

Also. always water till you got 10% run off to prevent salts from building up.

The idea behind calmag is providing both calcium and magnesium in a balanced solution, too much of one can effect the uptake of the other. Epsom salts or magnesium sulfate offers more sulfur to your plants than magnesium which isn't a bad thing, but again in balance. Too much of any one element will have a negative effect.

Too much potassium can effect magnesium uptake. What nutes are you using for a base? Did you add any "bloom boosters" when you flipped to flower?

really the debate over cal mag usage depends on source water... if you have soft water or hard.....

it could be mg def but it also could be K def.... without knowing what your feeding its hard to say.. usually Mg will show also in taco leaf curl or twisting aswell as burning on the edges

I see that same thing when my room is hot... so I figure its either heat stress or K def which is more common during high temps... both Ca and Mg lock out K ....

so your options are to raise Mg or raise K...
if we new what ppm of each active element was being fed it would likely tell us which it is

I find if you have soft water (as I do) some calmag is good if you need the calcium but the ca to mg ratio in the cal mag will always provide more Calcium than Mg therefore I recommend using both at the proper ratio to achieve the right mix...again impossible to conclude without knowing what your feeding.... otherwise its trial and error