Leaves clawing in mid/late flower

[lockedshed]

Its been 10½ weeks since 12/12 flip, but a helpful member suggested its more like day 48-ish.
I believe this is because I had a bug zapper in the room at lights out and maybe a bit of light coming through the very top of my curtains, but I cant be sure if these delayed anything.

Grown in coco, 5 gallon pots. Feeding just canna coco a + b twice daily.
Ec in 1.2 (cut out cal mag and lowered overall ec due to leaves clawing, burnt tips and high runoff ec - 2.8, from 1.7 in) for about 10 days now.
I water so that I get between 600 - 1200ml runoff, trying to lower the ec, which is currently down to 1.9 - 2.1. It never goes lower.

Light about 800ppfd or 35DLI (roughly as im having phone issues atm), but the light is nearly touching one plant and the main seed plant is about 6 - 12 inches away. Its at max height. (I've had at least 2 plants herm due to a heat wave in believe)

We've had hot weather and even with A/C temps have got up to 29 - 30c lights on, 27.7c lights off last week, for a day or two. (Peak, not prolonged all day)
Up until then, temps and humidity have been stable and vpd is around 1.2 - 1.4 at this stage in flower.

I thought the clawing was due to excess nitrogen, but I'm not so sure after cutting out cal mag and lowering feed.
Some of the leaves also look a bit dry and brittle, a bit like a saw.

 

[lockedshed]

Nobody?

 

[Bigalmoby]

I have one right now that clawed like that they never came back even after I fix the issue sometime they will stay clawed look for new clawing that might help

 

[Bigalmoby]

What your temp and rh average

 

[dankstranger]

Its been 10½ weeks since 12/12 flip, but a helpful member suggested its more like day 48-ish.
I believe this is because I had a bug zapper in the room at lights out and maybe a bit of light coming through the very top of my curtains, but I cant be sure if these delayed anything.

Grown in coco, 5 gallon pots. Feeding just canna coco a + b twice daily.
Ec in 1.2 (cut out cal mag and lowered overall ec due to leaves clawing, burnt tips and high runoff ec - 2.8, from 1.7 in) for about 10 days now.
I water so that I get between 600 - 1200ml runoff, trying to lower the ec, which is currently down to 1.9 - 2.1. It never goes lower.

Light about 800ppfd or 35DLI (roughly as im having phone issues atm), but the light is nearly touching one plant and the main seed plant is about 6 - 12 inches away. Its at max height. (I've had at least 2 plants herm due to a heat wave in believe)

We've had hot weather and even with A/C temps have got up to 29 - 30c lights on, 27.7c lights off last week, for a day or two. (Peak, not prolonged all day)
Up until then, temps and humidity have been stable and vpd is around 1.2 - 1.4 at this stage in flower.

I thought the clawing was due to excess nitrogen, but I'm not so sure after cutting out cal mag and lowering feed.
Some of the leaves also look a bit dry and brittle, a bit like a saw.

that dont look like just nitrogen claw to me

looks more like the plant got pickled in salts and cooked a bit up top at the same time. coco will do that. folks call it growing in coco but really its hydro in a brown blanket. if the root zone gets loaded up, the leaves hook down, tips burn, and then the close LED / hot spell makes em dry and saw tooth looking

runoff at 2.8 from 1.7 going in says there was a pileup in the pot. now yer putting 1.2 in and still seeing around 2.0 out, so the pot is still giving back salts. that dont mean panic but it does mean the root zone aint clean yet

old clawed leaves usually dont come back. same as an old sunburnt fan leaf outside in august. once its cooked or hooked it mostly stays that way. watch the newer sugar leaves and the fresher fans. if new stuff stops clawing you already turned the corner

id do this

keep feeding light, not plain water every time
coco still wants food in the water
maybe 1.0-1.2 ec for now and pH around 5.8-6.0
water slow and even so the whole pot gets wet not just channels down the side
dont let the pots dry back hard between feeds
dump runoff dont let em sit in it

if you really wanna reset it, run a good amount of mild feed thru each pot, not straight water like soil guys do. bring that runoff down closer but dont chase it all day like some bottle chart robot. trend matters more than one number

also that light is too close for a stressed plant. 800 ppfd is plenty in late flower, and if one top is near touching the fixture that top is getting slapped. dim it some or bend the tall tops away if you cant raise it. id rather finish at a little less light than keep hammering em and make more nanners

and kill that bug zapper during dark. dark means dark. no blue glow no little curtain crack no gadget light. these modern polyhybrid candy plants herm if you look at em crooked sometimes, especially with heat and light leaks. old mountain weed had to handle moonlight wind and deer piss, but these tent lines can be soft

at this stage i wouldnt start changing ten things. youre close enough to finish that the job is to steady the ship

light feed
cooler canopy
dark dark nights
good airflow but not a fan blasting leaves dry
keep checking for nanners
pull dead crispy leaves if theyre done
dont strip her naked now

buds look like theyll still finish. just dont expect the damaged fans to pray again. get the root zone cleaner and the top heat down and ride her out. real medicine comes from a clean finish not from beating the plant with more bottles in the last stretch.

 

[Ninjadogma]

Your runoff sample tells you everything you need to know. Needs more fertigation. Keep pouring until the output at least gets into the same ballpark as your input. 2.8 is high but if you're at peak moment of flower you want to be around 2.5 but only briefly and then you want to taper it down to match a diminishing demand curve as the plant winds down.

 

[lockedshed]

Your runoff sample tells you everything you need to know. Needs more fertigation. Keep pouring until the output at least gets into the same ballpark as your input. 2.8 is high but if you're at peak moment of flower you want to be around 2.5 but only briefly and then you want to taper it down to match a diminishing demand curve as the plant winds down.

I put 5 litres through all 4 pots.
1.2 ec in, 1.9 out. I'll flush more and try and bring it down.

 

[WinJr63]

Turn down light intensity until leaves are flat again.

 

[lockedshed]

that dont look like just nitrogen claw to me

looks more like the plant got pickled in salts and cooked a bit up top at the same time. coco will do that. folks call it growing in coco but really its hydro in a brown blanket. if the root zone gets loaded up, the leaves hook down, tips burn, and then the close LED / hot spell makes em dry and saw tooth looking

runoff at 2.8 from 1.7 going in says there was a pileup in the pot. now yer putting 1.2 in and still seeing around 2.0 out, so the pot is still giving back salts. that dont mean panic but it does mean the root zone aint clean yet

old clawed leaves usually dont come back. same as an old sunburnt fan leaf outside in august. once its cooked or hooked it mostly stays that way. watch the newer sugar leaves and the fresher fans. if new stuff stops clawing you already turned the corner

id do this

keep feeding light, not plain water every time
coco still wants food in the water
maybe 1.0-1.2 ec for now and pH around 5.8-6.0
water slow and even so the whole pot gets wet not just channels down the side
dont let the pots dry back hard between feeds
dump runoff dont let em sit in it

if you really wanna reset it, run a good amount of mild feed thru each pot, not straight water like soil guys do. bring that runoff down closer but dont chase it all day like some bottle chart robot. trend matters more than one number

also that light is too close for a stressed plant. 800 ppfd is plenty in late flower, and if one top is near touching the fixture that top is getting slapped. dim it some or bend the tall tops away if you cant raise it. id rather finish at a little less light than keep hammering em and make more nanners

and kill that bug zapper during dark. dark means dark. no blue glow no little curtain crack no gadget light. these modern polyhybrid candy plants herm if you look at em crooked sometimes, especially with heat and light leaks. old mountain weed had to handle moonlight wind and deer piss, but these tent lines can be soft

at this stage i wouldnt start changing ten things. youre close enough to finish that the job is to steady the ship

light feed
cooler canopy
dark dark nights
good airflow but not a fan blasting leaves dry
keep checking for nanners
pull dead crispy leaves if theyre done
dont strip her naked now

buds look like theyll still finish. just dont expect the damaged fans to pray again. get the root zone cleaner and the top heat down and ride her out. real medicine comes from a clean finish not from beating the plant with more bottles in the last stretch.

Thanks for all.of the information.

I'll flush more low ec food through, 1.2 and ph 5.85.
I'm down to ec in 1.2, ec out 1.9.
My temps are down to 23 - 24c Lights out, 26 - 27c lights on - i cannot lower them any more.
Ive turned my Mars hydro fc6500 down to 55%, from 80%.
My dark time is all dark.now.

Im trying not to blast the leaves, but as its so dense in there, im trying to get that air movement to all of the buds and leaves in the middle, sone are touching but I cannot do anything else to stop that as I have no room.

I've super cropped multiple times on the same plant, and its still growing past the light. Its green crack 2 0 is has grown crazy compared to the others, it takes up ½ of the tent.

Top oscillating fan on 6, blowing on the clawed leaves. Middle oscillating fan on 5, bottom on 4.
6 inch Inline intake and exhaust, negative pressure always.
I'm checking all the time for the pollen sacs/nanners.

 

[lockedshed]

What your temp and rh average

56 - 61 RH
Temp 23 - 27c