Clawing/Nitrogen toxicity

Hello everyone !


Running DWC 5Gal (19L) setup with full canna aqua line and autoflower seed from white label, i changed my reservoir to flowering nutes at week 7, right after i noticed she drunk a massive amount of solution within 24h ( around 1gal/4 litters), and having a lot tilted down. ( see below )


IMG_20191129_190447.jpg


As she was showing sign of nitrogen toxicity, i though swapping to flowering nute would resolve this, but 24h later and she's looking like this :

IMG_20191130_094230.jpg

i choosed to replace 2.5Gal/10Litters of solution last night by ph'ed water with slight amount of pk13/14 ( which i didn't used before ) to lower the nitrogen level while trying to maintain a fair amount of PK. the situation doesn't seems to have changed sinced, but i'm really worried, am i handling this 'right' ?

i also noticed there's N in my PH down (ghe), as i use hard tap water, could it be the problem ?


things to consider :

-she's always been quite dark, although not this much, and not glowy, i always though it was the strain, but she might have been in nitrogen abundance all along ( quite unsure )

- first timer

- i feel like i switch to flowering nutes around the right time, as i switch when i realised she stopped stretching ( well, and showing sign of nitrogen toxicity, but i was counting on switching around that day, maybe was too late ? )

- i didn't pushed on the flowering nutes, i used same concentration ml/l wise than i was with vegetation nutes. (which were eventually a little too high, but never had burnt tips or clawing)

as example, a picture of 2 weeks ago :


IMG_20191114_191848.jpg
 
Last edited:

70's natureboy

Well-Known Member
That's not gonna turn around in 24 hours. It will take a couple weeks. At least you know what not to do next time. I just tried some Floranova Grow this time and got some claw on some of my N sensitive plants. I'll do something different next time, either a lower EC or switch to bloom nutes sooner. Yours looked great 2 weeks ago.......unless that was week 5 of flower then they look too small.
 
Yeah i guess.
I'm currently in week 7 from seed, 2 weeks ago was week 5 from seed, that was 1 week after showing pistils will see how it develop...

Almost sure i switched too late, i shouldn't wait for the stretch to completely stop.
 
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