why do these new leaves look wilted?

anyone know why the newer leaves on this otherwise apparently healthy plant look like this? they are at day 37 and on 3/4 strength nutes. they are in a 4" rockwool cube surrounded by hydroton. watering is on a timer for 2 minutes at a time at 7 a.m, 10 a.m. 3 p.m 7 p.m and midnight. using High Output fluoros with blue spectrum. temp is consistently between 68-72 and humidity between 40-60%. please help.

Check the ph, and you might be running too high of a ppm...

Your starting to get that rust look on a few leaves, common for too much nute.

Other than that, looookin Gooood!

oops, i attached the wrong pics. here's what i was talking about

thanks closetgrowth, I am consistently running pH at 5.8-6.0 and also my PPM is around 1200. from what i've read, that should be the right ranges, but since this is my first grown, i'm not sure. just to be on the safe side, i'm going to dilute the reservior with distilled water, that should bring my PPM down a bit.

dangerousdiggity said:

thanks closetgrowth, I am consistently running pH at 5.8-6.0 and also my PPM is around 1200. from what i've read, that should be the right ranges, but since this is my first grown, i'm not sure. just to be on the safe side, i'm going to dilute the reservior with distilled water, that should bring my PPM down a bit.

Click to expand...

Still looks a bit high on the nitrogen side of things...

1200 is cool.. no problem with that..

what is your room temp and rez temp?

What kind of water are you using?

room temp is consistently around 69-72 and the humidity is between 50-60. using distilled water in the res. mixed with the nutes.