Coco coir, remo nutrients and led.

[floravita]

Hy there , so here is my grow i do it in 5x5 tent .
now im at 6 plants per tent.

im having problems at about week 4-5 in the leds... for the last runs and dont seem to get my head around it . they got a little nute burn... but all the others runs didnt had and still showed the same defficiency. flower goes well until the 4 week... and then i start to get these signs ...

Here s the set up :
Coco coir . 5 liters pot
thinkgrow led 640w at 800 ppfd.
co2 1000 ppm
temps 26-28
UR - 70-75%
controlled by trolmaster so vpd is on point.

Im using remo nutrients at full strenght . now im using a teros 12 sensor , and watering 8x a day , trying to keep then inside the 30% to 45% WC.

they are at 29 days into flower .

Any toughts ?

 

[coreywebster]

Could be a potassium deficiency or a bunch of other shit.
What EC does running remo at full strength give you? You running the whole line?
Seem to think it's an expensive range with lots of bottles but I might be wrong.

I might be inclined to say you can have too much of a good thing , as in cut your ec down.

 

[PJ Diaz]

Too many irrigation events IMO. I would guess that the EC of your substrate is very high because of all the feeds. Coco has a high CEC and will hold on to nutes.

 

[Herb & Suds]

I’m at a loss because you say nute burn but for a month into flower they look small for coco which would lead me to believe under fed

 

[rootforme]

What's the ph of the substrate? I know coco is usually in the right ph range but if you've over fed with too many events the ph could be off.

 

[PJ Diaz]

What's the ph of the substrate? I know coco is usually in the right ph range but if you've over fed with too many events the ph could be off.

I was thinking the same thing.

 

[rootforme]

You also may have let the coco dry out too much at some point which would let salts build up and could experience lockout or burn. And that could happen in just part of the root zone so you would only see the effects on parts of the plant.

 

[grotbags]

looks like potasium deficiency.
the op is using a teros 12 sensor so he can monitor water content and pore water ec, so its unlikely its too dry or too wet, or overfed.

 

[floravita]

Could be a potassium deficiency or a bunch of other shit.
What EC does running remo at full strength give you? You running the whole line?
Seem to think it's an expensive range with lots of bottles but I might be wrong.

I might be inclined to say you can have too much of a good thing , as in cut your ec down.

Hy there thanks for the words , Im running now at 2.5 EC running the whole line. they had a spike in ec due to drying back to hard.

 

[floravita]

Too many irrigation events IMO. I would guess that the EC of your substrate is very high because of all the feeds. Coco has a high CEC and will hold on to nutes.

The irrigation events are barely keeping up with the plants as in , they are below what i would want for the stage i i would want then above 35 % WC.

I’m at a loss because you say nute burn but for a month into flower they look small for coco which would lead me to believe under fed

My irrigation events were off.. and they went tru a week of hugeee drybacks and they burned a little at that week.

What's the ph of the substrate? I know coco is usually in the right ph range but if you've over fed with too many events the ph could be off.

PH of run off is at 5.4 ish...and they are getting 5.9 to 6 . and maybe that happened also

looks like potasium deficiency.
the op is using a teros 12 sensor so he can monitor water content and pore water ec, so its unlikely its too dry or too wet, or overfed.

my pwec at media is around 5 -6 , and water content ins btween 30 to 45% wich is max sat that i get . but like i said they went tru a tough dry week... and ussualy i get under the leds this that looks like a potasium def that i cant get around it .


Thanks for allthe inputs ! im looking to correct this lets see where they go

 

[Gdp1]

Cut ur e.c back to 2.0 ph 5.8 feedings at least 6times a day that gives you a 3 hour dry back period start with that and see how it works out

 

[coreywebster]

Yeah that dry period with such high EC has buggered your chops.

I run 1.4ec all through flower and if I let my coco dry out fully a couple of times it would cause all sorts of hell in the medium and your at 2.5ec .

I get you must be doing many plants in small pots but it might be wise to double your pot size in future, buys you a bit more wiggle room and bigger root zone can't hurt.

BTW is this drain to waste or recirculating?

 

[floravita]

Cut ur e.c back to 2.0 ph 5.8 feedings at least 6times a day that gives you a 3 hour dry back period start with that and see how it works out

I ll cut it back today and check accordinly , but in the last run with lower EC i ran into trouble also.

Yeah that dry period with such high EC has buggered your chops.

I run 1.4ec all through flower and if I let my coco dry out fully a couple of times it would cause all sorts of hell in the medium and your at 2.5ec .

I get you must be doing many plants in small pots but it might be wise to double your pot size in future, buys you a bit more wiggle room and bigger root zone can't hurt.

BTW is this drain to waste or recirculating?

Hy there , for sure that dry week didnt do then any good , 1.4 Ec for me its just to low for LED with co2 and VPD running good i run my tent in the hotter side of things 28c they drink up quite a bit..... my VEG i run 2.5 ec and they love it they are flourishng even if they dry a bit no problems there... also until week 4 of flower i never see any issues .... its starts around the week 4... for last 3 or 4 runs.... one run that i ran out of CO2 i didnt have issues.... just and an observation .
For my irrigation strategy and events... i do generative for the first 3 weeks , staking up that ec ideally i would be 2.5 - 3 .... and after third week i would go vegetative.... and lower EC... keeping it wetter so ec stays lower and also giving it lower to then little by little.... and for the last weeks... i would go back to generative with lower ec for then to finish up. generative i would ideally want to go from 45%ish max saturation to 25 % drying back , vegetative 45%iush to 35% but this run i slipped... cause indeed they were to big for their pot drinking like crazy , in the future i ll go 2 gallons... transplant into to it 4 to 5 days before flip... so i can get these drybacks and control then as i want.

 

[grotbags]

i think your pot size isnt helping, 5 liter pots for 6 plants in a 5x5 sounds small.

i am just about to start messing with water content /pore water ec meters(acclima), so i have been reading up on crop steering and dryback percentages ect. it amazes me how high an ec you can run when dialled in.

your still looks like potasium def, maybe exagerated by being to dry.

what do remos numbers look like for npk, ca, mg, ect how do they compare to jacks, athena and others?.

 

[floravita]

i think your pot size isnt helping, 5 liter pots for 6 plants in a 5x5 sounds small.

i am just about to start messing with water content /pore water ec meters(acclima), so i have been reading up on crop steering and dryback percentages ect. it amazes me how high an ec you can run when dialled in.

your still looks like potasium def, maybe exagerated by being to dry.

what do remos numbers look like for npk, ca, mg, ect how do they compare to jacks, athena and others?.

Hy there brother.... pot sizes can be a bit trick, but i ussualy see people not going over 2 gallons for proper cropsteering in order to have good control of drybacks... to big of a pot and u ll need a big grow space cause they will blowup and become huge, my mistake with this pot was that i vegged then for to long in these last pots.... so when i flipped the drybacks were pretty strong already not letting me do what i wanted with then, next round... i ll go from clone to 2 liters pots and 4 days before flip i ll transplant then into 2 gallons pot with 6 liters of coco , with hoppefully will give me hability to run generative for the first 3 weeks before they are able to dry out to quick and by the time they develop roots over the whole pot i ll be going vegetative with irrigation events... yes for sure amazes me how high of EC people are able to run inside the pots when properly done .
Im figthing my way there ehehe.
And as far as nutrients go.. im not the best at comparison of lines and all that , i was doing living soil for years... just tending to my soils and pretty much that was it , and when it came to bottles i just followed instructions cutting maybe 20% off ,and off i went with good results under hps ... but with leds , co2 and all that i see that its another game... if i can say that

 

[coreywebster]

Well tbh your far more technical than I am.
Touched on subjects I've barely looked into.
Been ages since I've heard anyone mention crop steering !

If you don't mind me asking what yield would be your ideal if all things went perfect with your current set up??

Hope you get it dialled in.

 

[grotbags]

Hy there brother.... pot sizes can be a bit trick, but i ussualy see people not going over 2 gallons for proper cropsteering in order to have good control of drybacks... to big of a pot and u ll need a big grow space cause they will blowup and become huge, my mistake with this pot was that i vegged then for to long in these last pots.... so when i flipped the drybacks were pretty strong already not letting me do what i wanted with then, next round... i ll go from clone to 2 liters pots and 4 days before flip i ll transplant then into 2 gallons pot with 6 liters of coco , with hoppefully will give me hability to run generative for the first 3 weeks before they are able to dry out to quick and by the time they develop roots over the whole pot i ll be going vegetative with irrigation events... yes for sure amazes me how high of EC people are able to run inside the pots when properly done .
Im figthing my way there ehehe.
And as far as nutrients go.. im not the best at comparison of lines and all that , i was doing living soil for years... just tending to my soils and pretty much that was it , and when it came to bottles i just followed instructions cutting maybe 20% off ,and off i went with good results under hps ... but with leds , co2 and all that i see that its another game... if i can say that

yer i hear you regarding pot sizes, i dont think you need to go much bigger just an extra liter would be 20% more volume that should be a good bit of extra buffer.

what type of pot are you using?

 

[floravita]

These are clones for the next round , and the moms... they are living a happy life

Well tbh your far more technical than I am.
Touched on subjects I've barely looked into.
Been ages since I've heard anyone mention crop steering !

If you don't mind me asking what yield would be your ideal if all things went perfect with your current set up??

Hope you get it dialled in.

Hey brother hope i didnt came out as a technical bll#% kind of guy wich im not i do my studies for sure but u know... , im just trying to wrap my head around this and by the looks of it u can tell im no expert at it ehehe. regarding crop steering its definately a topic that im diving into, trying to make my tent more effective for sure... i would be very happy with over 2 pounds in the 5x5 .... but lets say if i was on top of it all and banging my girls up there i think 3+ pounds its doable if u have the genetics for it and everything else.

yer i hear you regarding pot sizes, i dont think you need to go much bigger just an extra liter would be 20% more volume that should be a good bit of extra buffer.

what type of pot are you using?

Yep... went wrong in many aspects this run .... exacly it will be rigth around that... and with less veg time on the last pot . by the time these went in the pots were all taken alredy and i coudnt catch then goon on me . Im using plastic square pots .

 

[Prawn Connery]

Runoff!

You need runoff with coco to flush old nutes out to prevent salt build-up. If you are experiencing the same nutrient lockout at the same time each grow, this indicates to me you do not have enough runoff in your system.

More feeding (irrigation events) is good. But only if, after each feeding, there is enough runoff to flush away the unused nutrient. If you do not have runoff, or not enough or – god forbid – you allow your runoff to soak back into the pot, then you will create nutrient hot-spots in your coco.

 

[Prawn Connery]

Double post. Stupid VPN!