Need very precise diagnosis

w33der · Dec 5, 2013

Hello guys

I need your expert help here.
You can see the spots appear in random places on the leaf but mostly from the inside part.
I'm using lemon acid for ph lowering and also adding calcium separate from the fertilizers.
It doesn't look like over fertilizing but leafs die faster when i add more fertilizers.
I'm wondering what method to use for faster recovery of the plant ,also you can see the new leafs are very small compared to the oldest one which was very big in size.

Thank you in advance for your posts.
Cheers.

robnarley1111 · Dec 5, 2013

What's your setup like? Soil/soil less? What kind of fertilizer are you feeding your plants? PH? Temps? Lighting?

The first leaf pic looks like magnesium deficiency, but looks like it could also be calcium as well and/or phosphorus deficiencies, or something else entirely. It's really hard to tell without knowing what your environment and feeding schedule etc is like. The more info you can give the better!

spliffbuddy · Dec 5, 2013

I'd give her a feed of trace elements on next watering and see if she perks up.

SnapsProvolone · Dec 5, 2013

Micro nutrient deficiency.

SnapsProvolone · Dec 5, 2013

Could be a lockout from you adding too much calcium.

topfuel29 · Dec 5, 2013

Fan leaves in flower will turn yellow and die. what your seeing there is normal.
Looking at your other leaves. IMO- you have a Phosphorus, the petiole is purple, and there is purple patches in your last picture. and a Magnesium deficiency.

Good Luck on Your Grow.

w33der · Dec 6, 2013

Thank you guys,

But how can i have deficiency when i give fertilizers regularly.
I env is: soil they are in third week in flowering, i'm giving 4.6.6 fertilizer but also i have calcium separatelly they are on 2x 250 HPS lights my PH tester was broken before one week and i can't tell for sure, temps are from 18 to 26 celsius.
I'm giving the calcium for the 4th time in 1 week period so i guess it can't block the fartilizers that quick or i'm wrong?
Let me know if my action plan is good:
I will flush with 4 litres of pure water and after 2 days will start giving only pure water with a little bit of calcium (or should i leave calcium and give the fertilizer) ?

Please share your opinion?

OzGrower87 · Dec 6, 2013

w33der said:
Thank you guys,
But how can i have deficiency when i give fertilizers regularly.
Please share your opinion?

Let me explain.

You give your plant too much nutrients (fertilizers in your case) and the plant uptakes those nutrients. The plant takes up too many nutrients and goes into a nutritional lockout - this causes the plant to completely stop taking all nutrients as it is stressed - this is what is called a deficiency by nutrient lockup. The plant will not absorb nutrients in an environment that is too acidic or alkaline, this is where ph matters too. If the environment is not within ideal range, certain nutrients will not be able to be absorbed by the plant, this is why you see all the bitching about ph.

OzGrower87 · Dec 6, 2013

w33der said:
Thank you guys,
I will flush with 4 litres of pure water and after 2 days will start giving only pure water with a little bit of calcium (or should i leave calcium and give the fertilizer) ?

Please share your opinion?

How about don't give any fertilizers and allocate the plant 5 days to recover without any nutrients at all? (see previous post in relation to why)Then slowly begin on pure nutrients at 1/4 strength and work your way up week by week.

w33der · Dec 16, 2013

Hi guys,

This problem is getting worse.
Two days after i flush the system problem become two times worse than before that.
Before the flush i give 5 days clean water and there was not any Improvement.
Please see the two new pictures and help
Its very urgent already.

Thank you for your help.

BustinScales510 · Dec 16, 2013

I think you answered youre own question, you should stop flushing with plain water if that is making it worse. They look deficient..during the middle of bloom is when they feed the heaviest. Just go back to your regular nutrient schedule,the leaves wont go back to normal though,you can just try to prevent it from getting worse.

w33der · Dec 16, 2013

Ok but these Spots look very strange.
When i look over the symptoms i cant find exact match.
If anyone seen something like that please share.
These leaves die very fast and the whole plant now have these spots.

mrblu · Dec 16, 2013

calcium usually causes spots

w33der · Dec 16, 2013

mrblu said:
calcium usually causes spots

Thank you,
I agree with that ,can you please let me know how to remove the calcium problem quicker.
When i flush the problem gets more critical.

spek9 · Dec 16, 2013

I would introduce cal-mag if it were me, but some may say that isn't the issue, so that's my initial imho guess.

Take some pics with the HPS off and let the guys here get a better, more natural look.

-spek

w33der · Dec 17, 2013

Here some pictures with corrected white ballance.
If it is more clear now please advice because they are dying every day.
Please help.

Regards.

Unclebaldrick · Dec 17, 2013

Feed your plant. Just my opinion. Complete fertilizer with a Ca Mg supplement. Hard to tell what's going on in the photo.

Edit: Ok, those pictures are better. My guess is that you're now struggling with a bunch of deficiencies. Feed it. Also did not see last page of responses and thought you were left hanging.

miz.khalifa · Dec 17, 2013

do you have bugs? look under the leaves and look in the dirt

bass1014 · Dec 17, 2013

^^^^^^^ what the very beautiful set of luscious leaves..lol said.. there looks like you have a lil infestation of spider mites.. neem oil or azamax or hell even dawn dish soap works as long as you get the entire plant wet. underside mainly .. but looks like the mites are draining them dry..

Cpappa27 · Dec 17, 2013

It looks like a magnesium deficiency. Magnesium can also be locked out by too much calcium.

Need very precise diagnosis

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