Need professional help identifying the deficiencies

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RookieMuffin

Well-Known Member
Hello I try to identify the deficiencies but I'm a little lost and overwhelmed.

I've made a lot of research but I'm not 100% sure if they have only one or more deficiencies. I 100% think I have magnesium deficiency but I also think I maybe have one of these:

-Nitrogen deficiency and/or Potassium deficiency

What do you think?

The first plant got deficient about 3 weeks ago and since then she grew almost not at all. Just a little. The other plants became deficient about 1-2 weeks later but they still managed to grow.

I feed General Hydroponics 3-Part. On the bottle they recommend schedules for:

-First roots

-First true leaves

-Growing

-Flowering

Right now I'm feeding the 'First true leaves'-schedule. But I think it's time to switch to the 'Growing'-schedule or what do you think? Is my plant still a seedling or should I give the 'Growing'-schedule by now?

I also feed with extra Cal/Mag (growing with LED) and whenever I lowered the amount of Cal/Mag the deficiencies got worse but by now I think they also have other deficiencies maybe the 'first true leaves'-schedule doesn't provide enough Nitrogen/Potassium?

I hope you can help me identifying what deficiencies I have and if I should upgrade to the 'Growing'-schedule with different ratios of the nutrients.

Biggest Plant top view (still a seedling or not?)
biggest_plant_top_view.JPG

Smallest Plant top view (did not grow a lot since got deficient)
smallest_plant_top_view.JPG

Plant deficiencies
deficiency1.JPG deficiency2.JPG deficiency3.JPG deficiency4.JPG
deficiency5.JPG deficiency6.JPG deficiency7.JPG deficiency8.JPG
 
R

RookieMuffin

Well-Known Member
ProPheT 216 said:
They aren't deficiency problems. They are lock out. Those plants are small, pretty hard to not have enough of what they need and make em look that bad.

I'd slurry test for ec and ph first b 4 doing anything
Click to expand...
EC is about 0.9 (0.45 base nutrients and 0.45 Cal/Mag as soon as I lower the Cal/Mag EC the deficiencies grow larger)
PH is 5.5-6.5

P.S.: I grow hydro
 
R

RookieMuffin

Well-Known Member
ProPheT 216 said:
They are way past true leaves. True leaves are the single finger serrated leaves that come out right away before the first 3 fingers
Click to expand...
Ok so better use the 'growing'-schedule by now?

Maybe that's why the smallest plant didn't grow any further? Because the ratios aren't good enough?
 
R

RookieMuffin

Well-Known Member
ProPheT 216 said:
Yea I removed that, looks like you aren't feeding enough on second glance
Click to expand...
Ok so I'll switch the base nutrients to the 'growing'-schedule.

What EC for base nutrients would you recommend to start with?

Right now I use EC 0.45 Cal/Mag (If I go lower deficiencies get worse pretty fast) and I use 0.45 base nutrients 'first true leaves'

What EC would you recoment to use with the 'growing'-schedule? If I go 100% recommended I'm easy at EC 1.5 base nutrients that's too high for a plant this size I think. What would you recommend?
 
R

RookieMuffin

Well-Known Member
coreywebster said:
Half of your ec is calmag..
Up your base nutrients .

Try and maintain a narrower pH, 6.5 is high , try 5.8 to 6.2.
Click to expand...
Is it bad that half of it is Cal/Mag? The ratios are off by that or what do you mean?

I'm rarely at 6.5 more like 5.5-6.3 but ok I will try to narrow it to 5.8-6.2. Thanks!
 
R

RookieMuffin

Well-Known Member
coreywebster said:
Your basing your need for calmag on the fact your not feeding a proper amount of base nutrients.

Start a fresh with the proper base nutes and then assess the calmag needs . Your base has calcium and magnesium already
Click to expand...
Don't you think I need more Cal/Mag because I'm growing with LED? A lot of people have this problem.

So what would you recommend? Make a Res with 3/5-3/4 of recomended base nutrients and no Cal/Mag at all and see how that goes?
 
ProPheT 216

ProPheT 216

Well-Known Member
RookieMuffin said:
Don't you think I need more Cal/Mag because I'm growing with LED? A lot of people have this problem.

So what would you recommend? Make a Res with 3/5-3/4 of recomended base nutrients and no Cal/Mag at all and see how that goes?
Click to expand...
You could probably add a ¼ of the recommended cal mag for some buffer zone without jacking up your ec, but again you don't know if you need it.

That's up 2 you, I'd just give them the base 4 a week and see.
 
coreywebster

coreywebster

Well-Known Member
RookieMuffin said:
Don't you think I need more Cal/Mag because I'm growing with LED? A lot of people have this problem.

So what would you recommend? Make a Res with 3/5-3/4 of recomended base nutrients and no Cal/Mag at all and see how that goes?
Click to expand...
I never need calmag but my tap water is of a good quality.
Personally I think unless your using RO then having your environment on point is better than throwing calmag at them.
 
R

RookieMuffin

Well-Known Member
I use distilled water... So I start with a 0 EC... That's why I'm adding Cal/Mag... What do you say? How to mix my new res...

When I use 60%-75% recommended base nutrients then my base nutrients are at about EC 0.86-1.05 ... Is that ok or to much? If it's good I will start with 60% and go up later...

And what about the Cal/Mag... since I use distilled water... should I mix my new res with some or not? Everytime I don't use Cal/Mag the deficiencies get worse... and I start with EC 0 water so it's better to add cal/mag isn't it?
 
R

RookieMuffin

Well-Known Member
ProPheT 216 said:
You could probably add a ¼ of the recommended cal mag for some buffer zone without jacking up your ec, but again you don't know if you need it.

That's up 2 you, I'd just give them the base 4 a week and see.
Click to expand...
I use distilled water with EC 0.0 I think I HAVE to add some Cal/Mag... don't you think so?
 
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