Help please, 8 plants already dead, one left :(. yellowing or n def. or sumthin

HELPPP please...

i had 2 bluecheese and 4 shaman and 2 churches and they are ALL dead, except this bluecheese which is on the way.

I really cant figure out what is wrong with them :(.

a week or so ago it was fine n all and now its half dead.

im growing in 1cm RC cubes under a 250 metal halide, air circulation is good and temp is between 22-24c.

A+B iconic @ 1/2 strength,
oxy-plus - 10ml/day {tank is 20L}
nytrozyme - {as directed on the bottle}
gurdian angel - {as directed on the bottle}
superthrive - {couple of drops in tank}
canna trichoderma. foiler feed 2-3 times per week

the rest of the plants died befor i started adding nytrozyme, guardian angel, superthrive, and trichoderma to the tank so i guess they have nuthing to do with it.

this bluecheese was the youngest one of the lot as i added it round 2 weeks later than the others and it was holding up. till a couple of days ago.

i strated off flooding 1x a day, moved up to 2x and now i have dropped it down to once a day.
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lower {older i think} leaves start to yellow from outside and work their way all over, and it happens rappidly over a couple of days, then the ones above them start to do the same and now i can see that even the top are starting to yellow on the edges tho its very slight.
the plant has not grown at all for about a week, since the lower ones started yellowing.


the yellowing is really bad on the lower ones.
stems are dark purple which i think is just normal.
i have already removed 2 lower leaves as they just got tooo yellow and they were the biggest leaves on the whole thing.


i have no idea what to do please help.
iv flushed it today with superthrive/guardian angel and about 1/3 strength nutes to see what happes.

any suggestions or ideas please, need help fast.

they look thirsty to start

fill out the form

E- indoor
E- hydroponic
E- 1cm rockwool
HCL-Hydro
E-Water source is tapwater
-Source water pH is around 7.5 tho i ph it down to 5.6 to 6.1 at all time {i aim for 5.8}
E-Age of plant around 2.5 weeks
E-Rate of application (1.5 ms)
E-Lighting source and distance from plant = 250 metal halide about 90cm
E-Air temperature (daytime between 22-25) and night around 19-20.
HD-Reservoir temperature no idea but its pretty cool.
E-Air % Relative humidity no idea.
E-Lighting schedule - 18/6
E-Type of ventilation your room has : big fan that keeps things in motion all the time.
TR-Did you pre-soak your media in pH corrected solution? yes..


i hope iv filled it out properly. but iv got all the information at the top anyway. pleasee help.

its almost dead but i wanna make sure that it doesnt happen again or at least find out what it is, i suspect it is nitrogen def. but dont know how to cure. :mad:
and all the plants get to the same stage very healthy and very good and then start the same pattern and die off the same way :(.
and iv just calculated iv gone thru around 20 plants now :(.

Quote:

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Originally Posted by phatsesh101

they look thirsty to start

fill out the form

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filled out the form, they cant possibly be thirsty tho. i feed them once a day, and at points was feeding twice, til i noticed they were a lil droopy.

oh n the way i feed them is kinda like flood and drain, i dip them in a nutrient tank for about a min or 2, wait till the water mostly drains out over the tank, n then move them back to their place where they can drain the left over while sitting.

When you foiler feed 2-3 times per week is it during light hours ? It should be at dark.
I never foiler feed till recently and I killed everything, about 20. Only did it a few times and things looked great. Then bam all started to turn just like yours.

Also had a cold blast on hydro water and they turned yellow almost over night.

The other thing is ventilation ? Are the getting fresh air or just push around air ?

Your not getting them enough water most likely. Do the ebb and flow or you could drip back to rez But they need more water. I run drip 130gph pump wide open on 6 plants 24/7. Those rocks do not hold water like hydrtron or all rockwool.

Quote:

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Originally Posted by LOC NAR on probation

When you foiler feed 2-3 times per week is it during light hours ? It should be at dark.
I never foiler feed till recently and I killed everything, about 20. Only did it a few times and things looked great. Then bam all started to turn just like yours.

Also had a cold blast on hydro water and they turned yellow almost over night.

The other thing is ventilation ? Are the getting fresh air or just push around air ?

Your not getting them enough water most likely. Do the ebb and flow or you could drip back to rez But they need more water. I run drip 130gph pump wide open on 6 plants 24/7. Those rocks do not hold water like hydrtron or all rockwool.

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yea when i was foiler feeding i did it under light, tho there was no heat problem therfor i dont think it was a problem tho i remember the leaves got a bit paper like but after a while got back to soft.
how did urs die, did they keep getting yellow till eventually they look like they shrunk real bad?

ventilation is good i say because they are in a built in closet and the door from the other side is always open, therfor air comes into the closet from the side and the hot air gets pushed out thru the top as there are holes in the uper side, so it circulates new air and not the same air, and that room is open to 3 different rooms that have open windows so air and temp are no problem, im giving them plenty water, as when i water i flood them as i have a nutrient tank/tub which i dip the whole pot {till about 80% from the stem in order to keep the top of the root dry} and then i take them out after soaking them for about 2 minutes 80% fully submerged, i was doing that 2x a day n now im doing it once as i think i was overfeeding them, i dunno man its pissin me off cuz iv lost so much and now i have the final set of about 6-7 plants which i just germd bout a couple of days ago and i have a feeling the same is gona happen.

we need a plan lool.:rastasmoke:

Are you growing in a grow tent?

If so read this http://boards.cannabis.com/plant-pro...-anything.html

symptoms look very familiar......

If you are killing everything in your growroom, different strains, different occasions. I would guess its enviromental.

Subzero :)

Top leaves look very dark green, and bottom leaves dying of, and curling I would probable say nute burn...whatever volume of nute you have in your res, I would pour an extra bit of ro water in to dilute it down to like 2/3 of its original strength. And maybe even before that I would flush with 1/4 strength nutes to give it a good flushing. Good luck

transplant into a fresh quality soil asap......no more anything except ph correct water (for soil). i'm sorrry but i do not see that plant surviving your hydro regimen which dseems to include everything but the kitchen sink and simply speed death along. transplant. And pray.

good luck

Quote:

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Originally Posted by subzero

Are you growing in a grow tent?

If so read this http://boards.cannabis.com/plant-pro...-anything.html

symptoms look very familiar......

If you are killing everything in your growroom, different strains, different occasions. I would guess its enviromental.

Subzero :)

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omg u just paranoid the fuck out of me, iv never heard of that shit, tho the sheeting that i had the inner closet lined with was some of that white plasicy pvc shit, and it was very old and had holes n rust in it, and i just wiped n disinfected it and put it in :wtf:.
fuck it tho, i ran in the room and took the fucker off n chucked it out :D. i aint taking nooooooooooooooo chances loool.

thx for the bit of info if it turns out to be wt it is im gona send u a baggy by post wen the time comes :rastasmoke: