Transition Issue

[SirGreen]

Hi guys
I take the opportunity to share a problem that i'm fightin with since i started growing.
Often, as soon as my plants start their preflower phase, they start to get pale and loose the wonderful color they had in veg time.
I think the problem could be a mistake in the change of nutes from veg to bloom.
For example now I'm running some ANQs and they were doing great before jumping into the bloom phase.
From that moment on everything went worst and worst.
My plants are currently on day 46 and usually my buds are much bigger than now.
P.s
Could it be a N toxicity?
I'm working with grow mix soil and it is a pre-fert one.
Thank u in advance for your precious help!

 

[SirGreen]

PPS
I always measure ph and try to keep everything in order.
My nutes are GH flora trio and some of the Adv Nuts additives now and then.

 

[SirGreen]

The thing I've noticed is that the babies are fuuuuuuuuull of leaves all around.
That's why I thought at N toxicity

 

[Waira]

Sir Green, fill out this form please, and we can figure this out faster,...https://www.autoflower.org/threads/...ill-out-first-with-the-data-that-matta.45991/
... this isn't an N issue, I see pretty severe heat/light stress-- curled, up pointing "teeth", pale color,.. if it's happening with every grow, every strain, it an environmental issue most likely, which can lead directly to defc. issues as well,...

 

[SirGreen]

Problem: Not satisfying beginning of flowering period!

Medium/grow method: Plagron Grow mix 70% - Canna Coco Plus 30%.

Feed: and supplements used: GH Flora Trio + GH CaLiMagic + Adv Nutes B52, Tarantula, Bud Ignotor, Big Bud, Overdrive.
I use them from the beginning in a very small dose and increase slowly towards the end.
I feed every time and flush after 7/8 days i see first pistils. Than i start with bloom Nutes.
water source:Tap water (approx EC 0.3)

Strain/ageutch Passion Auto Night Queen

light used: Hps 600w 20/4

Climate:25C day / 16/18C night

Additional info:i don't face this problem all of the times but often.
I think it has something to do with nutes in transition phase.
Yesterday I tried to measure the EC of the water after mixing it with Flora Trio and it was quite low (0.9).
I have to admit that I don't measure EC frequently before feedings instead of ph, which I always maintain in a 6.1/6.3 range.

 

[SirGreen]

P.s
Talking about the environmental issue:
I'm not sure about this possibility 'cause it's the same place where i grow plants since 4 years and i had several wonderful crops.
Even last time .
Could it be just a strain issue?
About heat issue:
My thermometer tells me everything's fine even though the leaves are not!
I've also put a good ventilation system in my grow and a powerful air recirculating system.

 

[Waira]

ahhh, my bad SG, I forgot to ask about RH and how direct the air movement is,... the wrong combination high T, low RH, light intensity and strong air movement can trigger these symptoms. How high up is the light? There's ambient air temp, but then there's a more close proximity related heat/intensity stress that happens as well,.. but as I look, I see even well lower down leaves are getting teeth curls too,...Temps are fine; pH is good; EC is kinda low (less than 500ppm USA equivalent, 640ppm EU?) for plants this large at this stage, but I can't link this to a nutritional issue ( I could be wrong too, but nothing rings any bells),... No, it's not a strain trait per se, but different strains have different tolerances and preferences for a wide variety of grow factors,... let's see what the info I asked for can tell,...

 

[SirGreen]

L

ahhh, my bad SG, I forgot to ask about RH and how direct the air movement is,... the wrong combination high T, low RH, light intensity and strong air movement can trigger these symptoms. How high up is the light? There's ambient air temp, but then there's a more close proximity related heat/intensity stress that happens as well,.. but as I look, I see even well lower down leaves are getting teeth curls too,...Temps are fine; pH is good; EC is kinda low (less than 500ppm USA equivalent, 640ppm EU?) for plants this large at this stage, but I can't link this to a nutritional issue ( I could be wrong too, but nothing rings any bells),... No, it's not a strain trait per se, but different strains have different tolerances and preferences for a wide variety of grow factors,... let's see what the info I asked for can tell,...

ight is 55 cm above colas and i have a vent oscillating on them.
In the same room i'm running 3 AUs that at the mom are doing just better.

 

[SirGreen]

 

[SirGreen]

I've just flushed them and i'm trying to keep EC higher now to see if that's the reason.