Skywalker Kush leaf curl

[Carbcon]

Hi guys and gals.

 

One month old Skywalker Kush from reserva.

H and g nutes, coco with mykos.

315w hi par. Vertical Philips 3000k.

8l rhizo pot potted up from 3.5l and was happy for first 2 days.

 

Had just got over a bit of nute burn.

What is the browning of bottom leaves at this stage likely to be? Lack of light?

 

Cleaned tent today so few plants got knocked so not worried about the orientation of stems.

 

Centre leaves pointing straight up. Leaf curling also.

 

On 18\6.

Light on 22-30c. Rh 60-80%

Light off has always been an issue. Usually hotter 26-32 with same Rh.

 

Had built up nutes but pushed a bit far. Flushed with .2 EC few days ago.

pH 5.8-6.0 for feeds.

Runoff has been 5.7-6.1 ish. Mostly bang on what I put in.

 

Have searched and leaves up meaning happy? So happy they don't show light to top leaves by closing them from light? Somebody convince me if that's the case.

 

Too much light?

 

Other sky Kush fine.

 

Your comments, questions, praise or ridicule are as always most welcome:)