Photo nute def identification

[bobthegrower]

Anyone tell what this is?

Ta




It progresses from the bottom up ,I took a cross selection of the leaves from start of signs to final leaf drop.
Bob

 

[Blackvelvet]

Copy and paste these questions with answers into a reply...

Strain of Mj?
Hydroponic or soil?
From seed or clone?
Age of plant in question?
What stage (Veg/Flower; how many days into)?
Medium (Soil, Rockwool, Hydroton etc.)?
Container/Pot size?
Have they been transplanted, if so how long ago?
If soil, composition ratios (peat moss, perilite, vermiculite etc.)?
If soil, was dolomite lime or powdered gypsum added at planting?
Water runoff Ph or other soil ph test?
Nutrients added?
Ratios of nutrients (N% P% K%)?
Feeding schedule?
When were they last fed/watered?
How are you determining when to feed/water (weight, wilting, etc.)?
TDS/EC/PPM?
Tap/RO/Distilled water?
Ph before and after adding nutrients to the water?
Is your Ph equipment properly calibrated?
Light intensity/Age of bulb/Wattage?
Distance to the canopy?
Temps at canopy?
Temps at root zone or reservoir?
Day/Night temps (Min.-Max.)?
Current air flow (CFM)?
Is there air blowing directly onto plant?
Using CO2?
Relative humidity?
Growing technique (Scrog, Sog, Supercropping etc.)?
Has plant recently been pruned, clones taken, fimmed or pinched?
Pests?
Chemicals used to irradicate?
If so,When?

 

[Core]

can you add more info ...like inviroment factors.....nute use and setup composition...how old are they.......but foremost you need 2 know the ph ....

but ph that looks ok from here....i think you need 2 bump the nutes a bit ...its hard 2 guess but it looks realy like a N def and mg shortage...but wait for other repleys i've been wrong before so wait for more opinions my friend...

 

[bobthegrower]

Strain of Mj? Grapefruit
Hydroponic or soil? Coco
From seed or clone? clone
Age of plant in question? 6 weeks from rooted clone
What stage (Veg/Flower; how many days into)? Day 21 bloom
Medium (Soil, Rockwool, Hydroton etc.)? Coco
Container/Pot size? 80 gallon bed with 50 plants (4 per sq ft)
Have they been transplanted, if so how long ago? 6 weeks ago
If soil, composition ratios (peat moss, perilite, vermiculite etc.)? Pure coco with 4 inches of lava rock as drainage.Bed is one foot deep
If soil, was dolomite lime or powdered gypsum added at planting? No
Water runoff Ph or other soil ph test? Soil test Ph 5.8-6.2 @ 300ppm
Nutrients added? Earth juice Grow 25ml/gal, Bloom 15ml/gal,catalyst 10ml/gal,1/4 tspn Epsom salts/gal,5ml molasses/gal.
Ratios of nutrients (N% P% K%)? 1.25 - 2.53 - 1.25
Feeding schedule? nutes twice a day ,ph adjusted water only at weekends.
When were they last fed/watered?last night
How are you determining when to feed/water (weight, wilting, etc.)? Moisture meter
TDS/EC/PPM? PPM input is 900 on a calibrated Tri-meter
Tap/RO/Distilled water? Tap (Ph 7.0,70 ppm)
Ph before and after adding nutrients to the water?Before Ph 7,after ph 4,then bubbled up to ph 5
Is your Ph equipment properly calibrated?yes
Light intensity/Age of bulb/Wattage? 3000w HPS over 50 sq ft(60 w per sqft)
Distance to the canopy?18 inches
Temps at canopy?78
Temps at root zone or reservoir? 75
Day/Night temps (Min.-Max.)? Max 78 lights on ,Min 75 lights off
Current air flow (CFM)? Sealed room with CO2 @ 1000ppm Computerized
Is there air blowing directly onto plant? No
Using CO2?yes
Relative humidity?70
Growing technique (Scrog, Sog, Supercropping etc.)?SOG
Has plant recently been pruned, clones taken, fimmed or pinched? Trimmed from base up to fit canopy.
Pests?no
Chemicals used to irradicate? N/a
If so,When?

I am assuming it's not a strong enough solution and possible K deficiency.But I'm following the max label instruction.I'm from the "less is more" school of thought and did not want to increase nute strength until I sought out some advise.

Thanks

Bob

 

[Core]

i dont wanne change my mind but a little overfertelizing with N could result in this yellowing 2...hope you solve it..i'l be watching and learning....

 

[bobthegrower]

With the soil test coming out at 300ppm I sincerely doubt that it is over fert........

 

[EddieShoestring]

it looks and sounds like a case of straightfoward N def-

good luck
]eddie

 

[Blackvelvet]

Your nutrient solution ph is 4 after adding the ferts and then you bubble it to 5? ph 5 is too low. Try not bubbling it. Try to adjust ph to about 6. You might experiment with allowing it to just sit and watch the ph over several hours before applying.

How are you measuring ph? After the coco is completely wet from watering /ferting, wait 30 minutes. Then apply a small amount of distilled water to the surface till you get a slight amount of runoff. Catch this. Test ph. Is this possible to do with your setup?

Is this right...earthjuice grow 2-1-1 and earthjuice bloom 0-3-1?

You should apply the fert water everytime you water. Make sure you get runoff.

Here is what your adding...(ppms)
n 131
p 79
k 87
mg 30 from the epsom salts
ca ?

Deficiency in bottom leaves is either n, p, k, or mg...

This is not really strong. N 131 should be enough. You really only need 100 ppm n applied with every watering in flower. 79 p is plenty. 87 k is low. mg 30 is this enough? Have you been applying the epsom salts all this time with your ferts? You don't have potassium deficiency like your thinking. Take some pictures of the plants with the leaves yellowing. If I were to guess, you might need a 1 time drench of epsom salts at 2 teaspoons per gallon. Don't do this yet till you post the pics and we are more sure...

I am sooo stoned

 

[bobthegrower]

Here are some details of the EJ website


Grow 28ml/gal = (N)150ppm (P)33ppm (K)63ppm (Ca)62ppm
Bloom 14ml/gal = (P)46ppm (K)30ppm (Ca)88ppm


EARLY/VEGETATIVE STAGE
EARTH JUICE RATE (N) PPM (P) PPM (K) PPM (Ca) PPM (Mg) PPM
Grow 20 ml
Bloom 8 ml
Meta - K 9 ml
MicroBlast 10 ml
Catalyst 5 ml
Total ppms 106 52 259 97 26

BLOSSOMING/FRUIT SET
Grow 25 ml
Bloom 10 ml
Meta-K 12 ml
MicroBlast 10 ml
Catalyst 7 ml
Total ppms 132 64 341 121 26

MATURE STAGE/RIPENING
Grow 35 ml
Bloom 15 ml
Meta-K 13 ml
MicroBlast 12 ml
Catalyst 10 ml
Total ppms 185 93 396 178 32

I'm not using the Meta K as I thought that coco contained enough K inherantly @ around the 180 ppm mark....I could be wrong.

FYI meta K :1ml = 27ppm K & 9ppm Sulpher

Those are the correct NPK values off the labels

 

[Blackvelvet]

Here are some details of the EJ website


Grow 28ml/gal = (N)150ppm (P)33ppm (K)63ppm (Ca)62ppm
Bloom 14ml/gal = (P)46ppm (K)30ppm (Ca)88ppm

Wow. Your applying 150 ppm calcium. You need to add more magnesium because of this. I bet your having magnesium deficiency with those calcium levels. I would be adding 1/2 teaspoon per gallon epsom salts per gallon along with the regular fert. When you start doing this, watch for potassium deficiency. Like I mentioned before, its very low in the ferts.

 

[bobthegrower]

Smoking some nice Congolese sativa whilst this works it's way though the system....Puff puff pass to Blackvelvet.....Thanks Mon.

I've always erred to the lighter side of feeding....and have not used the EJ (previously was Metanaturals in peatmix which was great) or the coco before.......

Always trials and tribulations on a new system.

I'll start using 10ml/gal of Meta's 1-5-5 and an extra 1/4 tsp of Epsom salts on top.And up the concentration to 1200ppm instead of 900.

Going to hit them with a foliar feed just as the lights come on to compensate for the Mg and K.

 

[bobthegrower]

I just read on the EJ site that they recommend feeding lettuce in NFT at the rate of

28ml/gal Grow
13ml/gal bloom

lettuce needs only a third of the strength of cannabis.......

Time to tend the anorexic plants!

 

[Blackvelvet]

I'll start using 10ml/gal of Meta's 1-5-5 and an extra 1/4 tsp of Epsom salts on top.And up the concentration to 1200ppm instead of 900.

Going to hit them with a foliar feed just as the lights come on to compensate for the Mg and K.

Don't up the concentration of bloom and grow. Do add the extra epsom and the 1-5-5.

n 157
p 90 somewhat excessive...
k 196
ca 150
mg 60

You should not need to spray anything. Its irreversible. Never spray around a hot bulb/lights on to prevent shattering and hurting you or causing a fire. Fert with every watering. Ensure you get quite a bit of runoff.

 

[icky420]

I was wondering if anyone got to the bottom of this?

 

[MynameStitch]

THat is a straight up nitrogen deficiency or lockout, I don't know which one, but I will say those color of leaves are from nitrogen.

25ml/gal, Bloom 15ml/gal,catalyst 10ml/gal,1/4 tspn Epsom salts/gal,5ml molasses/gal.

With using all that I can gurantee it's lockout.

Why are you feeding like that?

Bob, black velvet has a thing around these parts; for one he is a cop, 2nd he goes around trying to fuck up everyones grow and normally posts some bullshit and do not come back to his posts. So watch out for his bullshit, I have him on ignore so I could care less what he talks about, cause it's all wrong; everything he ever says is incorrect.

How often are you feeding?
What are you using to pH adjust the water with?

 

[happysun]

huge dose

huge dose

Yeah...

Earth juice Grow 25ml/gal, Bloom 15ml/gal,catalyst 10ml/gal,1/4 tspn Epsom salts/gal,5ml molasses/gal.

Thats a heroic dose for sure. I'm using EJ and coco in flower and i'm using 5ml of grow and 10ml of bloom per gallon. Make sure to keep the coco from drying out. Whenever I have tried to water the coco like soil I get leaves like yours.