35 days in fllower, some advise please

These ladies are 35 days in 12/12, looking healthy, but there are a few leaf are curling up with some spot on them, this only is only happening to a couple of fan leafs on the colas on the top which is the tallest, the other cola have no sign of this!

I think it might be too hot, but it is around 12-14" away from a 600W HPS, not too sure!

I have read to FAQ, but cant seem to match it to my problem, some advise would be greatly appreciate.

I think it might be too hot, but it is around 12-14" away, not too sure!

Temp 65F(lights off), 80F(lights on), Humidity 50-55%, ph 5.8, EC1.8, growing using DWC aero sprayer.

Some pics below:








thx

I have edited it, can you see the pics now?

i cant see any pics

still no pics

I will try attaching them instead

how about now? =(

some help or advise would be greatly appreaciated

To me it looks very much like potassium (K) deficiency...here is a link for you https://www.rollitup.org/view.php?pg=...article&id=588 check the potassium out. Other than that, I love your plants!

Someone help this man out immediately...!!!!I'm not qualified too...lol I am but I have a hard time getting out what i mean...lol

Thx nici

I have check out the link, and I dont think and I am not sure if it is a case of the "potassium (K) deficiency"

I have work out what the brown spots on the leaf are, it is the organic seeweed spray for the leaf, and forgot to spray water after to rince off, so it got a wee bit burned

The two side edge of the leaf are spiked up like 2 upside down sawblade, not sure why this is happening!

It only happens to the colas, closest to the HPS, so it make me think heat stress, but no edge of thr leaf are burned? I am a little confused, anyone have some other suggestion please feel free to share, thx in advance, and thx nici again

Heat stress doesn't have to burn your plant to effect it.... It looks hot and a little nute burnt

It's 5 o'clock somewhere

Heat stress doesn't have to burn your plant to effect it.... It looks hot and a little nute burnt

Click to expand...

Thx will back the light off a little, and go easy on the nutes, see if it improves.

It's 5 o'clock somewhere said:

Heat stress doesn't have to burn your plant to effect it.... It looks hot and a little nute burnt

Click to expand...

Jus what I was thinking. I would also say humidity as well, but your percentage seems good, you may wanna check the humidity at night, that may be playing a small factor.

12 inches is 30cm right? if thats the case then 600W is far to close, if you put your hand at the tops does it feel hot?

Ive read that you should have the light 50cm away, 40cm for a 400W.

ive had this its heat stress sure you've a couple of leave's heaading in circles at the top, im in day 35 myself "not good for xmas tokin" higher the lights stick another fan in

Beautiful plants! When I saw the leaf tips bending upwards, I knew that it was rare and I had seen it before. Believe it or not, I think you have a magnesium deficiency. I would also go ahead and prune out the lower growth and fan blades at this point.

To view what Mg deficiency looks like and the solution to fix, visit this link and look at photos 15, 16 and 17. http://www.drugs-forum.com/growfaq/97.htm

That's what happens when people read to much. Leaves curl when they are over heated trying to reduce the amount of exposure to the heat source.

It's 5 o'clock somewhere said:

That's what happens when people read to much. Leaves curl when they are over heated trying to reduce the amount of exposure to the heat source.

Click to expand...

So the leaf edges are turning toward the light? That makes no sense.