Leaf curling down

[mnaggs]

I am doing my first grow and could use some tips!

Plants are at the end of veg, 18 hour cycle, temp 62-78F, humidity 30-70%
Soil/coco mix, pH is 6.5
I wait for the soil to completely dry out before watering (3-4 days)

I have been keeping the ppm around 1500-1800 mostly. I thought I was blocking K uptake by giving too much N so I cut the nutrients in half on my last feeding to see effect (700ppm). Now one of my plants is showing a hard down curl (see pics)

Everything i've read has said this would be N tox or over watering but neither quite make sense to me.

What do you guys think? Deficiency?

Thanks for any help or suggestions! Much appreciated

 

[GreenMachinee]

Wow that looks very strange... My first thought was maybe overwatering? but obviously not as you water every 3-4 days.. it may be under watering maybe. do the leaves feel lifeless? they dont really look like it. So that leads me to think it must be some kind of deficiency but it doesnt look like anything ive seen. Have you noticed any bugs?

 

[DEAN420]

I've done a lot of coco grows and usually veg at around 450ppm and flower at 900ppm 500scale. pH 5.8veg/6.3flower

To me it looks a lil overfed and has some pH issues

Lower your ppm and pH to 5.8 until the leaves straighten out.

 

[DEAN420]

And don't let your coco/soil mix completely dry out and water when 50% dry!

 

[Serpent]

to munch (N) you can see the toxic dark green ,flush with PH water to start over then feed 1/2 1/4 to get the plants back on track other then that your looking good not to worry just a little set back

 

[4our2wenty]

hi guyz.
i have similar prob, the leaves are curling down n the tips of few leaves has started turning yellow.
how can i post the pics?

 

[Serpent]

hi guyz.
i have similar prob, the leaves are curling down n the tips of few leaves has started turning yellow.
how can i post the pics?

Top left see gallery go to that and click upload its easy from there

 

[4our2wenty]

it seems like nitrogen toxicity?
the plant was not fed for the first 3 weeks. started getting the "Claws" at week 3.
flushed it few times but the prob continued, its a month old today, the claws got worse n the leaves curled. all new growing leaves r getting claws too. any suggestion? help?

 

[Serpent]

the Flush should have help do you flush a lot of PH water throw the plant a pot that size i would flush 2-3gallons just to clear it up

 

[4our2wenty]

ya my pot is not small. but i flushed it twice, each time with 1 gallon water.
water used for flushing:
i bought a distilled water which was supposed to be pH 7. but i checked the ph n it was 6.5, was still suitable so used it.

 

[Serpent]

ya my pot is not small. but i flushed it twice, each time with 1 gallon water.
water used for flushing:
i bought a distilled water which was supposed to be pH 7. but i checked the ph n it was 6.5, was still suitable so used it.

Ok give it a few days it should clear up not to worry

 

[4our2wenty]

i have last flushed a week ago. but still all the new growth is getting affected.
I'll give it 1 more flush n see if it helps.

 

[jrod420toke]

I’m currently having this same problem with one of my 2 plants and I feed them both pretty much the exact same I think I may have accidentally gave her a lil more than the other bc I split a gallon jug between them when feeding nutes

 

[melissacornet]

My plants are doing the same ... So I should flush them. How do u flush them...