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Any ideas on this one
- Thread starter chomsky
- Start date
Looks like rapid pH swing.
What does the mixed feed come out at prior to pH adjustment? How much time elapses between mixing/pHing and watering?
Side note. What's RH and do your fans blow directly on plants?
Some of the leaf tips look like they may show burn soon, though it's hard to tell.
What does the mixed feed come out at prior to pH adjustment? How much time elapses between mixing/pHing and watering?
Side note. What's RH and do your fans blow directly on plants?
Some of the leaf tips look like they may show burn soon, though it's hard to tell.
I grow in a coco mix using organic practices watering with rain water.
I never check my pH and if you do you will find the pH is lower when it wetter.
Once my mix is buffered and the pH stabilizes I give little thought to it.
I know that it swings depending on how much moisture it is holding.
Lower readings in reading the bottom of the container also.
I am starting to think burn one should be here.
He was big on telling growers that checking pH is like a dog chasing it's own tail.
I feel the same way with the style that I use to grow.
Heh heh heh
Not sure what your doing?
Edges of the leaves look like they want to roll up .
Makes me think heat.
Coco can be quite salty if not flushed.
Also know that coir as it breaks down continually releases potassium and if the fertilizer that you are using is high in K it can lock out Ca. and Mg and other cations.
Na. Cl. Ca. Mg. and K all cations compete for uptake if they are out of balance weird things will show.
Where exactly on the plants are the affective leaves?
By where the affected leaves are can tell you if it is a mobile or immobile element.
Ratz
I never check my pH and if you do you will find the pH is lower when it wetter.
Once my mix is buffered and the pH stabilizes I give little thought to it.
I know that it swings depending on how much moisture it is holding.
Lower readings in reading the bottom of the container also.
I am starting to think burn one should be here.
He was big on telling growers that checking pH is like a dog chasing it's own tail.
I feel the same way with the style that I use to grow.
Heh heh heh
Not sure what your doing?
Edges of the leaves look like they want to roll up .
Makes me think heat.
Coco can be quite salty if not flushed.
Also know that coir as it breaks down continually releases potassium and if the fertilizer that you are using is high in K it can lock out Ca. and Mg and other cations.
Na. Cl. Ca. Mg. and K all cations compete for uptake if they are out of balance weird things will show.
Where exactly on the plants are the affective leaves?
By where the affected leaves are can tell you if it is a mobile or immobile element.
Ratz
chomsky
Member
Edges of the leaves look like they want to roll up .Makes me think heat.
Coco can be quite salty if not flushed.
Also know that coir as it breaks down continually releases potassium and if the fertilizer that you are using is high in K it can lock out Ca. and Mg and other cations.
Na. Cl. Ca. Mg. and K all cations compete for uptake if they are out of balance weird things will show.
Where exactly on the plants are the affective leaves?
By where the affected leaves are can tell you if it is a mobile or immobile element.
Ratz
Yea the edges are rolling but the temps are solid at 82-85 with 60%RH and Im running Co2... It does feel stuffy in my grow room though. I just hooked up an exhaust fan on a timer. Its going to run for 5 minutes every hour or so just to move some air. Im pumping air out from the top of the room so as not to get rid of much Co2. Im really getting sick of trying to reinvent the wheel. Soil is so good and so easy for me anyway... This scrog is kind of a pain in the ass too.... Im terrified that Im removing too much from the bottom. However, everything I have ever read says to remove all growth below the screen... Im worried Im removing too much? My whole point of a csrog is to maximize my yield...
As for DTW, Im probably not draining enough. I don't have a drain in my grow room. I do get some runoff though... I feed the coco and as the plastic containers fill below the pots I suck the runoff out with a baster till it quits draining. (kind of a pain in the ass)...
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I am sorry that I can not be of more help for you.
I remember how it felt to see your love ones suffering and not knowing what to do.
Running thoughts!
Transpiration happens at the leaf edges and if transpiring to much can burn the edges.
It is potassium that enables the internal temperature not to burn the leaf edges.
Excessive evaporation from leaf edges causes burning.
You did not answer my question of where on the plant are the affected leaves?
So what is in the fertilizer what is it N P K ratio's?
I really no nothing about drain to waste only my experience as a organic grower.
Its just often that troubles in coco coir start because of it high ratios of salt and potassium.
Ratz
I remember how it felt to see your love ones suffering and not knowing what to do.
Running thoughts!
Transpiration happens at the leaf edges and if transpiring to much can burn the edges.
It is potassium that enables the internal temperature not to burn the leaf edges.
Excessive evaporation from leaf edges causes burning.
You did not answer my question of where on the plant are the affected leaves?
So what is in the fertilizer what is it N P K ratio's?
I really no nothing about drain to waste only my experience as a organic grower.
Its just often that troubles in coco coir start because of it high ratios of salt and potassium.
Ratz
The baster blows. You need a std. 5 gal bucket and this. Best $22 I ever spent.
http://www.homedepot.com/p/Bucket-Head-5-gal-Wet-Dry-Vacuum-BH0100/202017218
Splurge and get the extension. Good luck. -granger
http://www.homedepot.com/p/Bucket-Head-5-gal-Wet-Dry-Vacuum-BH0100/202017218
Splurge and get the extension. Good luck. -granger
chomsky
Member
LOL YOU AINT KIDDIN.... IT BLOWS!!! Good idea Thanks Granger
chomsky
Member
OK here are a few more pics. This is still an issue and I really am having a tough time diagnosing... I did two complete flushes over two days and the girls exploded. I woke up this morning to this. Its not wide spread but its definitely spreading. I'd really like to nip this in the bud (Pun Intended).... Any help much appreciated... My best guess is calcium def however, Im using a cal
mag nute with my regular nute system (vegamatrix) and even using a bit more Earth Juice Cal mag???
mag nute with my regular nute system (vegamatrix) and even using a bit more Earth Juice Cal mag???
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chronosync
Well-known member
Just let them get light. Theres really not much you could do except tweak your VPD to increase transpiration. I dont know how to do that really, youd have to look it up.
Id say youre going to have to go kinda slow in those pots, but once they get going you could have some seriously large plants, i would consiser raising the screen already, but its hard to tell by those pics.
Plants look big already. Cool.
chomsky
Member
New growth?
Old growth?
IRRELEVANT TO HELPING YOU(lol):
BTW I'm in 7 gal pots as well, what week are you on? and are you from clone or seed? Can I see your canopy
EDIT: Found yoru grow from post history
I started from seed and heres a link to my grow
https://www.icmag.com/ic/showthread.php?t=318819
chomsky
Member
Dude they are going, they are exploding with growth even with this issue. Im going to stay with the fix Kyle Kushman recommended and If I dont see real improvement in a day or so Im going to do a major flush then start slow from scratch with feedings... I must flip soon...
chomsky
Member
How long does it typically take plants to bounce back from a mag def (for the yellow leaves to actually go green again)? Is it ok or not recommended to flip to 12/12 if there is a deficiency happening? My girls are still growing and I cant let them get too much taller at this point...
chronosync
Well-known member
If it were me and i really wanted to reset the medium i would run 7 gals through each pot at reduced ec, if you are using cal/mag already, use that too. After rinsing/leeching/flushing pots, charge with new solution @ new feed mix strength, etc. Making sure to fill to enough run off that the pots are fully charged with new solution.
Another way to do it would be to start feeding the new mix, but with extra runoff, after a few feedings the solution should be fully replaced then.
Bouncing back from mag def? Probably not long considering its common and usually mild.
You want to have your plants in tip top shape before you switch the cycle, but health being an ongoing thing, i would see if the adjustment helps and if theyre looking good go for it!
If you have to veg more it could be a blessing in disguise, most likely being more weight in the end.
Another way to do it would be to start feeding the new mix, but with extra runoff, after a few feedings the solution should be fully replaced then.
Bouncing back from mag def? Probably not long considering its common and usually mild.
You want to have your plants in tip top shape before you switch the cycle, but health being an ongoing thing, i would see if the adjustment helps and if theyre looking good go for it!
If you have to veg more it could be a blessing in disguise, most likely being more weight in the end.
C
Collembola
hello,
it looks very much like magnesium,
calcium stunts the new growth i think (but not sure (would assume cal appears with other problems) (i say this having not accurately diagnosed calcium before though (i dunno how common a problem it is tbh)
i have got spotting like you have earlier by the plants running low on some micro-nutrients, but sufficient nitrogen, when i kept them in pots too long (but prior to becoming rootbound).
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i would epsom spray, plants can handle ALOT also, i dunno the grammage but i would guess i have been using 1/4 cup in 1l water.
i like to do at nightime (prior to lights off etc), so they don't get light burn etc > epsom looks quite crystaline.
you can just top dress with it also, sprinkle around
(but obviously stop when symptoms have improved / gone, then you can know the strain (specific), will require more then you had been giving it.
i wouldn't flush, as deficient, i think.
imho/e
it looks very much like magnesium,
calcium stunts the new growth i think (but not sure (would assume cal appears with other problems) (i say this having not accurately diagnosed calcium before though (i dunno how common a problem it is tbh)
i have got spotting like you have earlier by the plants running low on some micro-nutrients, but sufficient nitrogen, when i kept them in pots too long (but prior to becoming rootbound).
----------------------
i would epsom spray, plants can handle ALOT also, i dunno the grammage but i would guess i have been using 1/4 cup in 1l water.
i like to do at nightime (prior to lights off etc), so they don't get light burn etc > epsom looks quite crystaline.
you can just top dress with it also, sprinkle around
(but obviously stop when symptoms have improved / gone, then you can know the strain (specific), will require more then you had been giving it.
i wouldn't flush, as deficient, i think.
imho/e
C
Collembola
sorry, also they look like they require more nutrients, generally then you have been giving them (in addition to the extra magnesium).
(they look to have less N, then beginning pictures)
i would increase by 1/3 or something and see how they go.
--------------------
usually although i am in soil and use bio-b, it can take like 4 days or something to see the effect of the nutrients which is usually most obviously N,
like they don't have the abbility to miraculously heal necrosis or anuthing, but you should see general improvement after a few days.
nutrients also highly dependant on water amount of medium, plants can't eat without drinking, so make sure the coco doesn't dry out / is completely wetted throughout when watering etc.
(although not meaning to sound patronising etc, sorry if)
regards
(they look to have less N, then beginning pictures)
i would increase by 1/3 or something and see how they go.
--------------------
usually although i am in soil and use bio-b, it can take like 4 days or something to see the effect of the nutrients which is usually most obviously N,
like they don't have the abbility to miraculously heal necrosis or anuthing, but you should see general improvement after a few days.
nutrients also highly dependant on water amount of medium, plants can't eat without drinking, so make sure the coco doesn't dry out / is completely wetted throughout when watering etc.
(although not meaning to sound patronising etc, sorry if)
regards
