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Light burn, cal def., Nitrogen burn?

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Light burn, cal def., Nitrogen burn?

TomRado 21 Replies 4,604 Views
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TomRado

TomRado

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#1
I'm seeing first signs of some problem on my top leafs during early flowering.
As a beginner it's hard for me to pin down, what do you think?
Grown on soil, mineral nutes, spider farmer 100w led about 40cm above canopy.
RQS Northern Lights Auto, day 33 since germination.

R
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#3
I was a bit reluctant with the run-off, could be. Wasn't sure it's not light burn. So I will water a bit more "flushy" next time and a bit less hot in n.
 
#5
Since you say overwatered, you would still suggest immediate flush? Or wait till pot is dryer and then go?
 
#7
one drop

look at his leaf tips

mild fry?

did we get ppm?

the ph of your soil, will b measured from the typical "watering's", 20% run off, same as ppm.

liming.... when did u transplant em, if at all, or were they started, in same dealeo? if it were just the centers, of new growth, I'd think calmag. is that white light u took pics, under?

I'm not contradicting, one drop. i want his take on these observations, for you.

you said you're newer so i also wanted to elaborate, a bit on one drop's, suggestions.

there's a great book... gar...

I'll go look. it's cheap.
@Aquaman and moshmen, may have free links, to a pdf version. it'd be very helpful. i use it, to this day.

here it is. one of the best books i have.
 

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#8
TomRado said:
I'm seeing first signs of some problem on my top leafs during early flowering.
As a beginner it's hard for me to pin down, what do you think?
Grown on soil, mineral nutes, spider farmer 100w led about 40cm above canopy.
RQS Northern Lights Auto, day 33 since germination.

RView attachment 971850View attachment 971853
Click to expand...
the top pic, looks right. lighting? angle? or different plants? same pot? can we see more pics, from diff angles? pull back so we get the entire overview, as well. on the upside- u can never have enough bud porn.

as a newer grower, u might start a journal. u might pick up a sponsor... never know, but more importantly, when u run into problems, you'll have a following, with immediate, help. sometimes i miss symptoms and just posting my own pics, will catch a different perspective, than the tent door, view, as well.
 
#9
and that shrug, from watering... ur distance to light sounds fine, but grab some pics, after the shrug wears off so we can b sure, there's no heat, or otherwise...clawing.
 
#10
OD, is going to want ppm and ph values

whatcha feed em? or did u already say?
 
#11
I'd flush now with mild nutrient solution and then let them dry up a bit. If the roots are sitting in hot soil I think you'll do more damage by letting them burn than you would by watering a bit too soon. Theyll recover from overwatering. A couple days of burning in a hot mix can cause unrepairable damage.
 
#12
dirtbag, is renowned, to the farm.
his input, is priceless; not to diminish OD, whatsoever and i
grow aero so my input- bottom of the list. just stuff i pick up, from growers, like OD and Dbag.
 
#13
TomRado said:
I was a bit reluctant with the run-off, could be. Wasn't sure it's not light burn. So I will water a bit more "flushy" next time and a bit less hot in n.
Click to expand...
They aren't getting light burn. You need to quit feeding so much. The twisted new growth and clawing fan leaves point to too much groceries in the soil.
To my eyes, it looks like it is getting overfed. I have seen this countless times and it often strikes shortly after flowering begin an the plant' needs change. I would recommend a good flush. Nitrogen flushes out the easiest, Phosphorus is a bitch to get rid of ecess. I use a lot less nutes than most, have good results, and seldom suffer from overfeeding and lockouts. Good luck and keep up the good work!
 
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#14
Not to mention, you stated they were auto plants. Autos are usually light feeders and should Hoover around 200-300ppm at max, until you plants tells you she wants more. I’d take dirtbags advice and flush with low ppm water.
 
#15
Yeah, maybe ran them too hot. Was watering at pH 6.5 at around 600ppm above tap water (around 7.8ph and 270ppm - 850ish total).
I guess it's in fact related to the changing needs.
Did a mistake putting them into my own garden variety soil mix with about 1/3 by volume organic soil, 1/3 coco coir and 1/3 mineralic (sand, pumice, zeolith, ..) and didn't know exactly where I was feeding wise.
Now the next mistake is feeding with mineral nutes (compo complete with 2%mag) in veg when aiming at organic during flower (had bought biobizz bloom and started slowly while eliminating the npk salts).
It's all a learning and I'm by no means depending on this experiments turnout.
 
#18
TomRado said:
Yeah, maybe ran them too hot. Was watering at pH 6.5 at around 600ppm above tap water (around 7.8ph and 270ppm - 850ish total).
I guess it's in fact related to the changing needs.
Did a mistake putting them into my own garden variety soil mix with about 1/3 by volume organic soil, 1/3 coco coir and 1/3 mineralic (sand, pumice, zeolith, ..) and didn't know exactly where I was feeding wise.
Now the next mistake is feeding with mineral nutes (compo complete with 2%mag) in veg when aiming at organic during flower (had bought biobizz bloom and started slowly while eliminating the npk salts).
It's all a learning and I'm by no means depending on this experiments turnout.
Click to expand...
sounds like u already have a head start.
i meant to say, i concur with dbag's assessment, far as sittin in heat vs makin em shrug, more.

don't forget- it's not what's goin in, that's measured... it's runoff 20...
our tap water, ppm... is imparting values, such as magnesium and calcium, to say the least. they count. I'm having to adjust, currently, learning tap vs r.o.

I'm just reading tea leaves and noticing a significant decline in my need to supplement, cal mag; actually, makin my job, easier...
and at $80mo in r.o., alone... n whatever cmag, costs.
didn't realize those were autos. if it's slated to be a bud on a stick, they'll transition, sooner. if it's a strong, 5' avg pheno... not so much. keep the height expectation, in mind. you may find it of use. u got fantastic advice, to go with ur previous knowledge. sounds like u already knew to aerate, well.

if you start a journal, link here.

so u can bring ur cool gang, with u.

believe me... u don't want me following u... today, was a good day.
 
#20
if that's foil: shit can it

it's thermal transfer properties suk

do better with mylar, panda paper, or flat white paint. if it's mylar: good on ya, daddy warbucks. stuff ain't cheap.
 
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