Leaf problem

I grow indoor on Special Mix Light soil , no fertilizer during veg state (4 weeks).
I've only added a slow release buffer-tablet and some Bacto
I use plain water ph 7.8 and cannot measure EC
The plant is grown from seed and is 4 weeks old.
Lighting source and distance from plant: PL-L 440W, distance 1-2 inch
Air temperature 22/27
Relative humidity 45-50 %
Lighting schedule 12/12
Only this one shows the problem other plants (10) are not affected
The stains are more orange irl then on the picture
http://gallery.wietforum.nl/12451665...7779_15023.jpg

Quote:

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Originally Posted by lcc2000

I grow indoor on Special Mix Light soil , no fertilizer during veg state (4 weeks).
I've only added a slow release buffer-tablet and some Bacto
I use plain water ph 7.8 and cannot measure EC
The plant is grown from seed and is 4 weeks old.
Lighting source and distance from plant: PL-L 440W, distance 1-2 inch
Air temperature 22/27
Relative humidity 45-50 %
Lighting schedule 12/12
Only this one shows the problem other plants (10) are not affected
The stains are more orange irl then on the picture
http://gallery.wietforum.nl/12451665...7779_15023.jpg

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it looks like maybe a ph problem although i'm no expert.

7.8 does seem awful high too. ...take a look through the link in my sig, Stitch really
knows her stuff!

I'm not an expert in plant problems, but I'll chirp in anyway.

Could be magnesium deficiency...or another micro nutrient deficiency.

I would lower the Ph a bit and feed them with good nutes that contain a proper micro and macro nutrient mix for your growth stage. I'm sure someone with more expertise in plant problems will be along shortly to correct me if I'm wrong.

Start off slow on nutes at first if you have never given them any before.

I'm not familiar with your soil; does it come with slow release food already in it?

Also, I see you have your lights set to 12/12. Are you trying to force flower? If your plants are ready to flower, you should definitely be feeding them by now I would imagine.

hi all trying to get some advice my leaves (old and young) are all curling under is this caused by too much water and to much feed . please help !!

oh so sorry of me i forgot to say hello . and im a newbie here . forgot cause plants are driving me crazy sorry

hi Jasonscruff, welcome to the forums!

Your best bet to get some help is to start your own thread and fill out the troubleshooting form as best you can. http://boards.cannabis.com/plant-pro...anted-one.html

It's frowned upon when you post your own unrelated plant problems in someone else's thread. It's called thread hijacking.

Start your own thread, fill out the troubleshooting form and post some pics and we will be able to help you out!. :thumbsup:

PH is way to high. It's nute lockout. You can get it under control.