Do all leaf deficiencies/toxicities leave a permanent scar?

[DevonDank]

Hi peeps hope everyone is well.

i know that deficiencies like calcium or magnesium leave a permanent scar on the leaves but does this rule apply to phosphorous tox as well?

i've a GSC at 7 weeks and pumped her a little hard with nutes and she started to curl upwards at the leaf edges. Having flushed with 50% solution a week ago and keeping the feed at that level (EC 800 pH 6.0) the leaf edges are still curled upwards and i am wondering if this is a permanent feature now or will they slowly resolve?

i dont want to underfeed her as she s just starting to flower up but paradoxically do not want a phos toxicity issue as tis will cause foxtailing

Any advice greatly appreciated, thank you

 

[derek420colorado]

Hi peeps hope everyone is well.

i know that deficiencies like calcium or magnesium leave a permanent scar on the leaves but does this rule apply to phosphorous tox as well?

i've a GSC at 7 weeks and pumped her a little hard with nutes and she started to curl upwards at the leaf edges. Having flushed with 50% solution a week ago and keeping the feed at that level (EC 800 pH 6.0) the leaf edges are still curled upwards and i am wondering if this is a permanent feature now or will they slowly resolve?

i dont want to underfeed her as she s just starting to flower up but paradoxically do not want a phos toxicity issue as tis will cause foxtailing

Any advice greatly appreciated, thank you

Pictures will help but for the most part if the tip is necrotic then it won’t come back.

 

[Arthur]

Majority of the time, once the damage is there, it there for the duration. Attention turns to new growth for signs of correction or other issues.

 

[DevonDank]

Pictures will help but for the most part if the tip is necrotic then it won’t come back.

thanks, they are not necrotic yet, that is what am trying to avoid as have learnt that once the edges curl up and go brown the plant wll suffer. hope i have caught it in time

 

[DevonDank]

Majority of the time, once the damage is there, it there for the duration. Attention turns to new growth for signs of correction or other issues.

thanks. the curling is fairly broad but too widespread to remove the leaves and look for fresh signs. always a challenge eh?!

 

[derek420colorado]

thanks. the curling is fairly broad but too widespread to remove the leaves and look for fresh signs. always a challenge eh?!

Do you have pictures

 

[DevonDank]

Do you have pictures

we got tell-tale signs of running feed too hot as the tips of the middle leaf fingers are burnt but no other defines that can note except perhaps theres a slight variation in leaf colour, some are slightly lighter than others but is that ?newer growth

in coco/pebbles, GNTelos 0010, intense nutrients coc feed at 800us EC presently

 

[derek420colorado]

What are your temps. It looks like a combo of things. Can you do me a favor and fill this out. It will save me from havin to ask.


Problem:

Medium/grow method:

Feed: and supplements used:

water source:

Strain/age:

light used:

Climate:

Additional info:

 

[DevonDank]

What are your temps. It looks like a combo of things. Can you do me a favor and fill this out. It will save me from havin to ask.


Problem:

Medium/grow method:

Feed: and supplements used:

water source:

Strain/age:

light used:

Climate:

Additional info:

Problem: EDGES OF LEAVES CURLNG UPWARDS

Medium/grow method: COCO/CLAY PEBBLES 20L FABRC POTS

Feed: and supplements used: NTENSE NUTRENTS COCO A+B, EC 800us, pH 6.0

water source: TAP WATER, HANDWATERED 3-4 X PER DAY 20% RUN O

Strain/age: RQS GRL SCOUT COOKES 7 WEEKS OLD

light used: GN TELOS 001 18/6 -500MM FROM CANOPY

Climate: 28.6 DEG CEL N THERE AT THE MOMENT, CAN SPKE TO 31 ON REALLY HOT DAYS (WHCH WE HAD 2 WEEKS OF PROR TO THS LAST WEEK), AROUND 22 DEG WHEN LGHTS O

Additional info: PUSHED HER UP TO AN EC OF AROUND 1400us UNTL NOTCED THE CURL THEN FLUSHED AT 800us AND HAVE REMANED AT THAT LEVEL SNCE. (THS STRAN BLOOMS LATE, LAST 3-4 WEEKS SO NOT TOO CONCENRED ABOUT LACK OF DEVELOPMENT AT THS AGE, SHOULD FLL OUT QUCK!)

(SORRY MY 'EYE' KEY S BROKEN!!!)

 

[derek420colorado]

Problem: EDGES OF LEAVES CURLNG UPWARDS

Medium/grow method: COCO/CLAY PEBBLES 20L FABRC POTS

Feed: and supplements used: NTENSE NUTRENTS COCO A+B, EC 800us, pH 6.0

water source: TAP WATER, HANDWATERED 3-4 X PER DAY 20% RUN O

Strain/age: RQS GRL SCOUT COOKES 7 WEEKS OLD

light used: GN TELOS 001 18/6 -500MM FROM CANOPY

Climate: 28.6 DEG CEL N THERE AT THE MOMENT, CAN SPKE TO 31 ON REALLY HOT DAYS (WHCH WE HAD 2 WEEKS OF PROR TO THS LAST WEEK), AROUND 22 DEG WHEN LGHTS O

Additional info: PUSHED HER UP TO AN EC OF AROUND 1400us UNTL NOTCED THE CURL THEN FLUSHED AT 800us AND HAVE REMANED AT THAT LEVEL SNCE. (THS STRAN BLOOMS LATE, LAST 3-4 WEEKS SO NOT TOO CONCENRED ABOUT LACK OF DEVELOPMENT AT THS AGE, SHOULD FLL OUT QUCK!)

(SORRY MY 'EYE' KEY S BROKEN!!!)

Ok first thing is them plants are heat stressed, can you lower them? I know that seems like a dumbass question because if you could cool it down I am sure u already would have lol. But I guess more specifically do you have enough air flow with an extraction fan and a fan to move the air inside?
Also Your leaf curl is not from nute burn. Imo it’s from heat. Also what is your RH%
As far as your tips being “burnt” that is actually perfect. This is what a lottttttt of growers who have been growing a long time tell when to back off their nutes. You feed em til you see that tiny bit of tip yellowing then back off 10% of your nute schedule.