pH problem/overfert..? (pics)

[hyposomniac]

Hi and thanks in advance..
here's the story:

I fucked up.
When these plants were about 10 days old, I fed them with a weak solution of pure blend pro (6-7ml/gal).
I have three different strains going, and they all reacted a little differently. They all had a nice growth spurt, but got a little burnt... now they seem to be suffering a pH problem (symptoms as described in other threads).
I gave em some plain tap water and tested the runoff.. somewhere between 6.0-6.5.. my kit is old and I no longer have any confidence in it. Will get something new tomorrow.
So I gave them a good flush friday and two of the strains look a little better but still aren't just right.. one looks pretty fucked.

Growing in a mix of Promix BX and Perlite (2:1) with a tb of dolomite lime per gallon. Under CFLs, good temps and lots of wind.

Mazar-i-Sharif.. the worst, 2 plants look just like this.
edit: the leaves on this strain have taken on an onion-skin feeling, dry and papery.


Jack 33.. showed the worst burns, but seems better now.



SSH... never showed burns, but this got a weaker dose (3ml/gal).. still showin droop (ph?)

 

[terminalc]

I would verify that the ph is 6 or 6.5. Looks like you just juiced them a little early. I'd flush with every watering until they look like they want food again.

 

[terminalc]

Also you say lots of wind... You only want a gentle breeze on plants this size. I have had some plant leaves become papery because too much airflow like you described on the Mazar. Is it closer to the fan then the others?

 

[hyposomniac]

Thanks, k+ for you.
The plants position is rotated to make sure everyone gets prime spots under the lighting.. the wind has made some strong stems, but I suppose all their leaves seem a little drier than they should.. Fan has been adjusted. What do you think about adding a dark period (from 24/0 to 20/4) to reduce transpiration?

 

[sirgrassalot]

yeah the pH is whacked that's a good excuse but used too often & not very original nor correct when using triple mixes. I haven't seen one to date on this board unless the grower has messed up. That could happen to anyone.

Your plants look over fed & over watered. Some of that could be a flush if that's what you did. I've never flush in triple mixes, especially a small cup full. I would have just watered them come time & would observe how they progress for future leaching & feedings. 24 hours a day is fine, I use a dark period to save hydro & my plants are always growing too large anyways. I should cut back to 18 myself, damn plants grow by themselves almost. I don't see major wind damage but be careful.

 

[stinkyattic]

I'd stick on your current light schedule. Wait to feed until ~5 nodes or so, or when you see the first signs of hunger. Also, I'd break off some chunks of the lower edge of your cups for better drainage, since you are going to be watering rather heavily to fix the overfert.