2 Sour Crack 2 Different Problems

[Haunts]

I've got 2 Sour Crack age 28 days, here's my grow diary https://www.autoflower.org/index.ph...rack-a-lackin-1st-hps-grow.47162/#post-894365 the taller ones new leaves are curling down-pic 1. The smaller girls leaf edges are curling up-pic 2. Any ideas?

 

[Renaissance Redneck]

Maybe take some natural light pics, Haunts.
What are you're temps running, and how much N are you feeding?

 

[StraightKRACK]

One seems to have to o mucg nitrogen and the other seems to not have enough. They are flowering from what I see. Are you still using vegging nutes on them?

 

[medic grower]

Curled down leafes could either be overdose of Nutes or simply too Hot in the Room with to less Airflow.
Which you second girl is pointing too too hot and the blades will curl. Beside that both look ok too me For Nitrogen def or overfed the Hps washes away the colors too much maybee some pics when the lights turn out to see the real colors.

 

[Haunts]

Maybe take some natural light pics, Haunts.
What are you're temps running, and how much N are you feeding?

The temps are 25c lights on and 20c lights off. I use plant magic soil along with there old timers organic grow which has 5-3-3 npk. They had there first feed about 10 days ago and then I was away on holiday for a week so they were pretty dry when I got back so gave them a second feed of grow.

Here's some better pics

 

[Renaissance Redneck]

I'd say you're looking good, Haunts. You may see some banged up leaves from the drought, and running dry like that can really mess with soil pH. I'd take it slow and steady for now and not over-correct.
Clawing can be a sign of N tox, but it can also be a genetic trait or caused by stress.
Do watch those lower leaves to make sure the yellowing doesn't keep creeping up.

 

[Waira]

...yeah, that's N-tox Haunt,... when did it occur, after the 2nd feed? Ditto for the edge curling? That smacks of dry/low RH/heat/high airflow speed stress, as mentioned,...Any combo of these can cause it, not just high T's alone, which you don't have, temp. is OK,... what's the RH like? And airflow- too strong on that, and it's ...do you have soil inoculant, or poop tea, etc., anything that boosts the microbe herd up? Using organic nute's, they're more important than ever, as it's their job to convert those nute's into available forms....

 

[Haunts]

I hadn't really noticed it happening until I got home but looking through my journal I can see it happening at day 21 so it's possible it started before their first feed, could it still be N tox?. The RH is 40-50. The only feed I have is organic grow and bloom from plant magic, I've never had this problem before but I was using cfls and this is my first grow with a hps. With the added heat I put in a pc fan blowing over the girls and the plant closest to the fan is the one that has the cupping leafs, so I've moved that to see if it clears it up.

 

[medic grower]

Dont know how you can get a N tox with a 5-3-3 Npk ratio. The fert i use over here has 16-6-26 and works out fine. Would check Ph could be that this factor jumped off. Most people underate how important a constant right ph level is.