Nitro toxic?

[Lungren]

hey all pic from about 41 days in
northern lights x big bud feminized autos
growing in coco coir
feeding AN A+B coco coir veg nutes
last feed was about 1/4 strength
temp steady around 26
RH 50-60%

 

[Waira]

-- odd to see this with coco specific nutes at this level of dilution,... usually it's a high n content Ca-Mg that can tip the scales to toxicity...
Are you feeding to 15-20% run-off, and testing pH and ppm/EC going in and coming out? Coco can't really be run like a true soil, it's behavior as a unique soilless medium makes it bitchy about several things,....
Dosage seems plenty mild, so I'm puzzled at the N-tox kicking in,... consider going to bloom nutes early, to reduce the N inputs... plants store quite a bit of N, and these girls have overly-full cupboards right now!

 

[Lungren]

sorry shoulda specified, i was feeding at full strength, with 2ml per 4 litres of calmend from dutch nutrients, wasnt sure on the dosage of calmend couldnt find recommended anywhere, and i feed till a litte bit of runoff and dont PPM the runoff, at 1/4 str was around 500 going in
PH in is around 5.7 and comes out about 6.0

 

[Lungren]

4 northern lights x big bud femenized from canuks seeds
3x3 tent, california lightworks 550 with controller
using AN lineup A+B and calmend from DN
RO water
50/50 mix promix and coco
20/4 light on/off
temp 19-26 lights on/off
rh 50%
was overfeeding a bit in veg gettin the crazy dark green leaves, hear it was N rich and toxic, had a little bit of the claw goin on
decided to flush out the plants around the time flowering started
flushed em out things seemed to be doing ok
started on the bloom AN A+B and the other 4 things they say for week 1 of flower
got a couple brown spots on lower leaves, decided to dfoliate the lower part anyway so i took most of them off
now gettin more brown spots on mid leaves, seem to be migrating up and more showing up everyday
havent fed since the first bloom nute dose
norm feed every 4 days or so, when pots are at least 1/3 the weight of full, just started to do it until runoff

thanks for lookin, and i think most of this info in the grow journal i started on here

 

[Mr Green Fingers]

4 northern lights x big bud femenized from canuks seeds
3x3 tent, california lightworks 550 with controller
using AN lineup A+B and calmend from DN
RO water
50/50 mix promix and coco
20/4 light on/off
temp 19-26 lights on/off
rh 50%
was overfeeding a bit in veg gettin the crazy dark green leaves, hear it was N rich and toxic, had a little bit of the claw goin on
decided to flush out the plants around the time flowering started
flushed em out things seemed to be doing ok
started on the bloom AN A+B and the other 4 things they say for week 1 of flower
got a couple brown spots on lower leaves, decided to dfoliate the lower part anyway so i took most of them off
now gettin more brown spots on mid leaves, seem to be migrating up and more showing up everyday
havent fed since the first bloom nute dose
norm feed every 4 days or so, when pots are at least 1/3 the weight of full, just started to do it until runoff
View attachment 1065764
View attachment 1065765
View attachment 1065766
thanks for lookin, and i think most of this info in the grow journal i started on here

Looks like phosphorus deficiency to me, you need to start feeding bloom nutes and I would be using a bloom booster or pk booster if you have any?

 

[Lungren]

Nice thx for the reply, started the A+B coco ph advanced nutrient bloom nutes at half STR last week,
Also used b52, voodoo juice, bud factor x, sensizym, bud factor x and bud candy at half STR as well
but that was only 2 days ago

 

[Mr Green Fingers]

Nice thx for the reply, started the A+B coco ph advanced nutrient bloom nutes at half STR last week,
Also used b52, voodoo juice, bud factor x, sensizym, bud factor x and bud candy at half STR as well
but that was only 2 days ago

Just make sure your ph is in range and your not locking anything out, old leaves wont improve and will probably get worse so look out for the new growth to see if things are improving

 

[Lungren]

Thank you, been at 5.7/5.8 going in and about 5.8/5.9 coming out, cept for one plant was at 3.8, flushed it with nutes till it came back up to 5.7... heard that was the thing to do
Hate to see all those leaves die off damn

 

[Mr Green Fingers]

Thank you, been at 5.7/5.8 going in and about 5.8/5.9 coming out, cept for one plant was at 3.8, flushed it with nutes till it came back up to 5.7... heard that was the thing to do
Hate to see all those leaves die off damn

Sounds like your good with ph then, only thing I'm not sure about is your medium as never used coco but from what I have read I think you should be feeding every day now but I will tag in a couple of coco growers for confirmation on that as I'm not 100% sure! @NiceOption @St. Tom

 

[Lungren]

Thanks much man! I'm not so sure either, running like 60/40 promix coco with some pearlite, shits still heavy and wet for least 2-3 days