zinc deficiency ? ? please help !!

hey guys im having a deficiency witch i cant get sorted out ...


here is a picture ~ !



zinc ? already tryed epsom salt and did nothing , did some research and found a guy with the same problem according to the picture and he had to much of cold night ( i did to i changed that and nothing changed really ... ?) oh and i changed that 4 hours before lights on so maybe day still had a cold night 3/4 of the way ? maybe need to wait some more ? ...

now i dont know what to do and im preaty sure i would get better results if i found my problem !!


oh and i got other kind to and there not affected as much ... the purple kush is doing way better but im starting to see the same deficiency on them slowly

the ones that are mostly like the pic is the Puple Urkle Kush

hope that help ?

thanks again guys !

oh and btw the more severe leafs are the one closer to the middle ... where the light output is at its strongest ... but then again it doesnt look burnt and the reflector is easely 18'' away

help please ?? !!

a picture of the whole plant would be helpful...nutes? temps? grow medium?

its not possible im under a HID hps changes color , and no other light in there if its off ..

the yellowing is only on the top grow ( kinda like zinc def pictures ... but im not sure )

all the 3/4 down is green , ad not all of them are yellow , 1/4 of them

i gived way to much water right before and there now drying for 7 days... and on ... + i mixed my molasse mix .. instead of 2tbsp i did 4 ..... my reading was flashing at 2000ppm +

maybe that didint help

im in coco

and im using Organic ( supposedly ) named Black Flower , its new http://www.hydrotek.ca/en/index.php type in black flower you will have more info

temps are in the day 26-28

at night before i changed it yesterday night was at ( 12-14c ) and now ( 20-21c )

ph , i find this brand has ph auto-adjust ? everytime i make my recipe in veg it alllways hit 6.50 ! not even 6.49 or 6.51 ... its crazy lol , tryed runing it like hydro and it didint work good , 6.5 in veg , and by adding the flowering nutes ones in flowering it goes down to 6.3 i never put ph + or - , but this time as i said i fucked up on the molasse so i had to put ph + ... quite a lot actuly ...

my reflectors are ventilated & @ 14-18''

humidity 60%

very good air circulation

co2 enrichment at 1500ppm ( girls are at 4 weeks now ... is that to much ppm ? waist is not a issue for 8$ a fillup lol )

EDIT :

i found this picture that is supposely zinc def ..... it looks 100% like mine if you want to refer

View attachment 2620481

now im starting to think about all this .... i put way to much ph+ to stabilize .. maybe ones in the pots it reacted and the ph went up like crazy and not according to zinc def this would be it ?

now how to fix this issue ? i have a good ph meter , how to take a mesurement of my coco ?

thanks in advance !

CO2 said:

its not possible im under a HID hps changes color , and no other light in there if its off ..

the yellowing is only on the top grow ( kinda like zinc def pictures ... but im not sure )

all the 3/4 down is green , ad not all of them are yellow , 1/4 of them

i gived way to much water right before and there now drying for 7 days... and on ... + i mixed my molasse mix .. instead of 2tbsp i did 4 ..... my reading was flashing at 2000ppm +

maybe that didint help

im in coco

and im using Organic ( supposedly ) named Black Flower , its new http://www.hydrotek.ca/en/index.php type in black flower you will have more info

temps are in the day 26-28

at night before i changed it yesterday night was at ( 12-14c ) and now ( 20-21c )

ph , i find this brand has ph auto-adjust ? everytime i make my recipe in veg it alllways hit 6.50 ! not even 6.49 or 6.51 ... its crazy lol , tryed runing it like hydro and it didint work good , 6.5 in veg , and by adding the flowering nutes ones in flowering it goes down to 6.3 i never put ph + or - , but this time as i said i fucked up on the molasse so i had to put ph + ... quite a lot actuly ...

my reflectors are ventilated & @ 14-18''

humidity 60%

very good air circulation

co2 enrichment at 1500ppm ( girls are at 4 weeks now ... is that to much ppm ? waist is not a issue for 8$ a fillup lol )

Click to expand...

Why so much Molasses?
Usually only 1 Tbsp/ gal.
To me, I would think N deficiency before Zinc.
That looks like a Sativa dom. leaf, and IME, the Sativas are nute hogs compared to the Indicas. (Right now I have a Sour Diesel and a Purple Kush side by side to prove it),
BTW, Epsom Salt is known more for MG than Zinc, so IDK what you might have accomplished there.

Bakatare666 said:

Why so much Molasses?
Usually only 1 Tbsp/ gal.
To me, I would think N deficiency before Zinc.
That looks like a Sativa dom. leaf, and IME, the Sativas are nute hogs compared to the Indicas. (Right now I have a Sour Diesel and a Purple Kush side by side to prove it),
BTW, Epsom Salt is known more for MG than Zinc, so IDK what you might have accomplished there.

Click to expand...

yes indeed the sativas are the ones that are mostly yellow !

im feeding them all the same nutes

epsom salt was just because i had it and heard good things about it

what do you suggest me to do ?

anyone ? please ..

I use this stuff as foliar spray, it has 17 micros including .05% zinc. Does it work? Don't have a clue but it makes me feel good and my plants are real healthy. Never used it to address a deficiency but I've never had one.

Found it in a hydro store for about $10 but the have it on amazon for 13. You only mix a tsp/16 oz water so an 8 oz bottle will last a LONG time


http://www.spray-n-growgardening.com/Spray-N-Grow-Micronutrients-8-oz/productinfo/SNG/

CO2 said:

yes indeed the sativas are the ones that are mostly yellow !

im feeding them all the same nutes

epsom salt was just because i had it and heard good things about it

what do you suggest me to do ?

Click to expand...

Grow before last, when I had a Sativa side by side with an Indica, I was mixing the same nutes for a while (while flowering), and feeding every second water.
As they got older, I would have to feed the Sativa every other water, while every second water was OK for the Indica.
Every once in a while I still added epsom in addition to 1 Tbsp/ gal Molasses and nutes.