Plants dieing under blackstar240 (AGAIN!) help

ok guys i am having a lot of problems with led, i thought i had it sorted by adding more iron but the problem is back, i grew two plants under blackstar240 2012 uv bloom model and they both died ( leaves started burning from the tips and all fell off ) that was in soil, this time i went coco to get better nutes into the plant and same thing is going on again, ive tried less nutes and more nutes and cal-mag and iron and nothing is helping, first few days was really good growth then it just seems to die. i am using canna A&B gave it 3ml per liter and cut it back to 2.3ml per liter. the burning starts at the bottom fan leaves and works its way up, i have the led at 16 inches above the plants and temps ect are fine, ph is 5.8 in coco, can anyone spread any light on whats going on as ive never had problems growing with cfl or hps and now i had to put them back under a 250w mh as i cant kill these plants again. plus rep for wisdom
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Oh yeah many people have told me many things and none have worked, so unless you are growing with led and know what the problem is please dont bother to leave your two cents

Have you grown with the soil mix from THIS bag? I hate soil. So much more control with hydro/aero, but then you have to get up to speed on a few things, which are easy to master

The only other thing it could be is your water

I may not get back to your thread, but think this will help.

If you want ideas on how to go hydro click on my journal

like i said i grew with soil and they died, now i am trying growing them in coco and same thing is going on, i am not looking to go hydro i am looking to find out what the fuck is going on with my leaves all burning away, they do not burn away under hps, also i ph my water to 5.8 with a ph meter how could my water be the problem? it never was before

If its the light then try raising the light. Usually if light burns the plant like that. Its either too much heat or too much infrared spectrum in turn too much heat.

With coco u do not add cal mag. Just mag. Theres already calcium in coco as well as potassium. So more than likely you have nute lock. It also looks like nitrogen burn. If you are using botanicare cal mag. That has edta in it. That will burn the shit out of your plants. If you even barely go over.



Also how often do you water. You could be over watering. That mimics phos burn. But the leaf tips usually curl a little and burn and dry out. I water twice a week no matter what size pot.

I grow in coco under leds too. Good news is your problems don't look too bad...yet. You said you tried calmag, how many ml per gal did you try and how long were you adding this? were you seeing new leaves being affected while using calmag? Also, what other nutes besides canna a & b are you using?

hyroot said:

If its the light then try raising the light. Usually if light burns the plant like that. Its either too much heat or too much infrared spectrum in turn too much heat.

With coco u do not add cal mag. Just mag. Theres already calcium in coco as well as potassium. So more than likely you have nute lock. It also looks like nitrogen burn. If you are using botanicare cal mag. That has edta in it. That will burn the shit out of your plants. If you even barely go over.

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You can use calmag in coco with out lockout...i use it every feeding. Have you personally experienced this?

Yes with canna coco. But not roots coco. I use roots original soil now

Well I also use canna coco, along with canna nutes supplemented with magical, and no lockouts...ever. Interesting to see quite different experiences.

really sorry Man
The look like mine looked! I would flush properly ... and leave them with no nutes for a day or two, than resume (I wish I'd done that straight away)
Mine ended up worsening and full plant wilted .... they are still alive and will harvest soon but what a harvest ahahah (ridiculous). Mine they look more like sick now, like those forms of phytium? So I think that developed along the way .... plus they were already burning and all like yours

anyway am not a experienced grower so I am sorry, but def flush if you havent! and maybe make a good list of everything, leaves affected lower or upper or generalized, and everything else you can throw in .... maybe with some advice you can correct things ..... I wish you will.

I'm no plant doctor but since it's happening with the very young plants and at the bottom of the plants and not the top where the new growth is, it's not the light.

I would look at the water's ph maybe it's making some weird nute-lockup being that low, forcing the plant to get it from the lower leafs instead.

When you grow in coco you gotta keep the ph at 5.8 when i grew in soil the ph was 6.5 and same thing happened, i was only using 1/2ml per liter of cal-mag but it dident do anything, the light is 16 inches away i dont see how that could burn, i allready flushed them yesterday, the leaves are not dark green so i was thinking it needed more nutes but when i upped the a&b to 3ml per liter it got worse so i flushed. i water every 4 days or so but it has been unable to dry this last few days with feeding then flushing, why do i have no problems at all under hps? also thought about too much red spetrum so i added a 45w blue cfl to the mix 2 weeks ago but it dident help, i really dont know what to do and wish i dident buy these leds right now

Try more calmag...i use 3-6 ml per gal. It wont bring back the damaged leaves but it should prevent going forward.

puffenuff said:

Try more calmag...i use 3-6 ml per gal. It wont bring back the damaged leaves but it should prevent going forward.

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So many have told me not to give them any cal-mag, do you think i need to? even tho canna A&B have lots of cal? 1/2ml per liter dident help so i dident want to up the dose

I am scared to even look at them now as i cant lose another grow like the last, i am 4 months without smoke!!!!

Yes, I think you need higher doses of calmag, try 5ml per gallon for a week and see if the problems halt. Also, if you aren't letting the coco dry out in between waterings, do so.

could you be over watering the girls, they wont drink a lot under leds and if the only thing you changed is the light that could be it.

why do i have no problems at all under hps?

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Just throwin' this out there, so take it for what it's worth and the price you paid.

It's possible that the LED is not giving the plants the same amount of energy to metabolize nutes and water the way the HPS lights do, so they may be getting more than they can handle, resulting in issues.

If growing under the HID is not a problem with you, I'd make the switch just to avoid all the issues. Take a clone or two, and experiment with the LED and nutes while your other plants are safely growing under the HID goodness.

I wish you luck regardless.

I had the same looking leaves....i was starting to sketch a bit....I decided to to put 5 grams of garden lime in with a 1.5l bottle of water (each plant)....shake it to shit....then tip it all on the soil...then more water in the same bottle...and flush it that way. I now water most times with garden lime. Those shit leaves are still there....But it solved my problem, and it hasnt come back. Fin.

Wilksey said:

Just throwin' this out there, so take it for what it's worth and the price you paid.

It's possible that the LED is not giving the plants the same amount of energy to metabolize nutes and water the way the HPS lights do, so they may be getting more than they can handle, resulting in issues.

If growing under the HID is not a problem with you, I'd make the switch just to avoid all the issues. Take a clone or two, and experiment with the LED and nutes while your other plants are safely growing under the HID goodness.

I wish you luck regardless.

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I only have a small space to grow one or two plants i have no other room to try growing under the led, they have been over watered this last few days but ive never seen a plant burn up after being overwatered. when it drys out am gonna hit them with alot more cal-mag and see if it does anything, they are under mh now as i am scared to death of them dieing again as i need some bloody smoke, fuckin wish i knew what was going on

update pics now even the top fan leaves are showing slight sign of leave tip burn

Do you have the coco mixed with perlite? If so, did you wash the perlite?

When potting the coco into pots, did you compress the coco down with your hand? If so, this would cause problems, gravity should do this for you.

Also when mixing Canna A and B, make sure you mix them seperate, mix A first, then mix the solution THOROUGHLY and then add B, if you mix them together or add Canna A and then B on top of A in say 1gal bucket without mixing, the nutrients can precipetate and lockout. You must first mix A into the solution thoroughly and then add B.

Try to water around the pot and make sure no water comes close or in contact with the stem, WATER slow around the edges, Try to let the coco dry out, and make sure the pot/root zone temps are between 68 - 75 F

Anything under 68F at the rootzone willl surely show Cal/Mag def, due to the cold locking out Mag at the rootzone, if your temps are at around 68f at the rootzone, increase temps to 75F and see how that goes.

Peace and happy growing.

cannabuilding said:

Do you have the coco mixed with perlite? If so, did you wash the perlite?

When potting the coco into pots, did you compress the coco down with your hand? If so, this would cause problems, gravity should do this for you.

Also when mixing Canna A and B, make sure you mix them seperate, mix A first, then mix the solution THOROUGHLY and then add B, if you mix them together or add Canna A and then B on top of A in say 1gal bucket without mixing, the nutrients can precipetate and lockout. You must first mix A into the solution thoroughly and then add B.

Try to water around the pot and make sure no water comes close or in contact with the stem, WATER slow around the edges, Try to let the coco dry out, and make sure the pot/root zone temps are between 68 - 75 F

Anything under 68F at the rootzone willl surely show Cal/Mag def, due to the cold locking out Mag at the rootzone, if your temps are at around 68f at the rootzone, increase temps to 75F and see how that goes.

Peace and happy growing.

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someone already told me i need to wash the coco before use i dident know so i flushed well and put the seedling in a bigger pot with well washed coco. the coco i have is already mixed with 20% perlite. and i dident push the coco down, i let the water do that.

i always mix part A well into the water before added part B and my temps are fine as i said,

i just mixed a light dose of 1ml per liter of A&B and 1 1/2ml of cal mag and gave it to them to see what happens