Nitrogen defficency in flower

K

Krazysmoker

Member
Hi guys it's my 4th week into flower and I am getting yellow leaves on the bottom of one of my plants.

I have kept the nuits low threw this grow as I usually have a tendency to over fert in flower my feed mixed is 700 ppm 1.1 ec ph 5.8 and I'm using canna coco, advanced nutriance sensi bloom and advanced nutrients big bud.

Question is so I just need to bump it up with the sensi bloom or could it be a lock out ?

Also I don't usually check the runoff ph so I will do that tonight and it get quite warm in the tent on the afternoon about 28c.
 

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HarryCooter

HarryCooter

Well-Known Member
Krazysmoker said:
Hi guys it's my 4th week into flower and I am getting yellow leaves on the bottom of one of my plants.

I have kept the nuits low threw this grow as I usually have a tendency to over fert in flower my feed mixed is 700 ppm 1.1 ec ph 5.8 and I'm using canna coco, advanced nutriance sensi bloom and advanced nutrients big bud.

Question is so I just need to bump it up with the sensi bloom or could it be a lock out ?

Also I don't usually check the runoff ph so I will do that tonight and it get quite warm in the tent on the afternoon about 28c.
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It's normal to get some yellowing mid-late into flower but it's hard to get an idea of overall health from that one photo. I don't have experience with coco grows, but what I do know is the plants are completely reliant on your nutrient feedings because they have no ability to dump carbs into the soil for microbes to in return feed them in cases of deficiency or need. If your ph is at 5.8 you shouldn't be experiencing lockout from that. Your may need to simply up your nutrients just a bit. If that doesn't work you can foliar some fan leaves and make sure the mix doesn't hit the bud sites.
 
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HarryCooter

HarryCooter

Well-Known Member
Another thought, have you fed it any micronutrients? The early onset of some micro deficiencies look like nitrogen deficiency at first. I ran into this during veg on some of my plants this year. Simple foliar spray of microblast works overnight.
 
K

Krazysmoker

Member
I'm just feeding advanced nutrients sensi bloom and big bud nothing elce, do I need extra micronutrients I also use tap water with high ppm so there a lot of calcium and other things that help in it.

I have bumped up to 1.3 ec 800 ppm and it seems to have stoped I checked runoff ph and it's fine 6.1 ppm is also fine in runoff
 
Walter9999

Walter9999

Well-Known Member
Consider what you're feeding them has little to zero nitrogen the biproduct is going to be yellowing...I usually don't stop adding some nitrogen in my feeding schedule until week 5-6...just smaller amounts than in veg...g/l
 
K

Krazysmoker

Member
Walter9999 said:
Consider what you're feeding them has little to zero nitrogen the biproduct is going to be yellowing...I usually don't stop adding some nitrogen in my feeding schedule until week 5-6...just smaller amounts than in veg...g/l
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My sensi bloom 2 parts part A has an npk 3.0.0 and part B 2.4.8 so I'm feeding nitrogen with both bottles, but I am feeding very light Iv been bumping the feed up every feed I'm now on 830 ppm

Would it help to put in some canna npk 5.4.3 ? I'm now into week 5 most other plants aren't experiencing it as bad as one most of her bottom storage leaves have turned fully yellow.
 
SouthCross

SouthCross

Well-Known Member
Everything you proposing to load the medium with won't work until you know exactly what the PH of the medium is. Early yellow in flower is the plant using internal storage of nitrogen because the ph in the medium is locking out the plant from absorbing nitrogen.

You can add all the stuff you want but if the ph is off and the plant can't use it. You've officially poisoned the growing medium by overdosing.
 
K

Krazysmoker

Member
SouthCross said:
Everything you proposing to load the medium with won't work until you know exactly what the PH of the medium is. Early yellow in flower is the plant using internal storage of nitrogen because the ph in the medium is locking out the plant from absorbing nitrogen.

You can add all the stuff you want but if the ph is off and the plant can't use it. You've officially poisoned the growing medium by overdosing.
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My ph of runoff is 6.1
 
Cx2H

Cx2H

Well-Known Member
Greetings again, looking at your original post. You are under feeding them

Day 21 should have EC around 2.0 with a pk bump in there for heavy formation.

And...

If you are in any Coco product and not adding atleast 1g per gallon of magnesium you will experience issues just like that.

4ml per gallon is recommended and ECs around 1.9

A ppm of about 550-650 is what you feed them when you want them in library mode and growing in SLOW motion, add flowers to that and it's not gonna go to good.

Answer inception. :-)
 
K

Krazysmoker

Member
Cx2H said:
Greetings again, looking at your original post. You are under feeding them

Day 21 should have EC around 2.0 with a pk bump in there for heavy formation.

And...

If you are in any Coco product and not adding atleast 1g per gallon of magnesium you will experience issues just like that.

4ml per gallon is recommended and ECs around 1.9

A ppm of about 550-650 is what you feed them when you want them in library mode and growing in SLOW motion, add flowers to that and it's not gonna go to good.

Answer inception. :-)
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I am bumping feeds up now yellowing has slowed right down, how do you recommend bumping my feed up 0.5 ml a feeding ? as I don't want to burn them I'm up to 9ml In 10 lt of tap water and 9 ml of big bud 840 ppm my plants aren't huge is why I was feeding less, I went over 1000 ppm in my last grow of og kush and I got nitrogen toxicity really bad.
 
Cx2H

Cx2H

Well-Known Member
Krazysmoker said:
I am bumping feeds up now yellowing has slowed right down, how do you recommend bumping my feed up 0.5 ml a feeding ? as I don't want to burn them I'm up to 9ml In 10 lt of tap water and 9 ml of big bud 840 ppm my plants aren't huge is why I was feeding less, I went over 1000 ppm in my last grow of og kush and I got nitrogen toxicity really bad.
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Well you are there with them so go by what you see. Ppm wise in Coco i hit 1000-1200 ppm weeks 3, pk shot from week 3-6 and taper down to 700 by finish.
In Coco I run 5-15-14 though start to finish. Last 10-14 days I'll drop that and run 0-3-2 .

I have Coco and Dwc on deck, the latter is an Advanced Nutrients run(using up old stock) and it gets tricky for some reason. Maybe the type of N they use but it will sizzle plants @ 1100 ppms...


Off hand is that big Bud for Coco?



To be continued(fading out rapidly)
 
K

Krazysmoker

Member
Cx2H said:
Well you are there with them so go by what you see. Ppm wise in Coco i hit 1000-1200 ppm weeks 3, pk shot from week 3-6 and taper down to 700 by finish.
In Coco I run 5-15-14 though start to finish. Last 10-14 days I'll drop that and run 0-3-2 .

I have Coco and Dwc on deck, the latter is an Advanced Nutrients run(using up old stock) and it gets tricky for some reason. Maybe the type of N they use but it will sizzle plants @ 1100 ppms...


Off hand is that big Bud for Coco?



To be continued(fading out rapidly)
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Yes it's coco big bud I'm using it at half dosage would you say it's looking good ? bud production is there bit slow mabie it's a 9 weeker also had some heat stress.
I'm in week 5 so end of this week I stop big bud and start overdrive, I might keep going up on ppm till I hit 1000 then go down at the end.
 
Cx2H

Cx2H

Well-Known Member
Krazysmoker said:
Yes it's coco big bud I'm using it at half dosage would you say it's looking good ? bud production is there bit slow mabie it's a 9 weeker also had some heat stress.
I'm in week 5 so end of this week I stop big bud and start overdrive, I might keep going up on ppm till I hit 1000 then go down at the end.
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They look fine to me. You are on point.

Just watch them because AN has a bunch of N and you would want to start cutting it back some.
 
K

Krazysmoker

Member
Cx2H said:
They look fine to me. You are on point.

Just watch them because AN has a bunch of N and you would want to start cutting it back some.
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Thanks So I will start week 6 on Sunday at the end of week 6 I'll be stopping big bud and start overdrive, do you think week 7 I sould start to dip down ppm ? Like go up to 1000 or 950 then slowly bring it down and flush it finishes at about 62 days 9 weeks
 
B

BRANDON77

Well-Known Member
I think they were under N when flower started.....but its started, might as well just finish. if you lose sun leaves in the process its ok.
 
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