Trouble diagnosing deficiency??

I've been told this is a few things, Mag def - which i treated with epson salts didn't help much.
I've =ot brown spots fan leaves are dying and new growth is stange and stringy. 4th week of flower running 2*34 watt CFL 6700k and 1*24watt "Warm White" CFL (2000K?) Will post photos below any help would be great. Giving Nitrosol fertilzer every month per package instruction. 1.2 Foot tall plant in 0.5 Liter pot.

Thanks in advance - Stay high

Nitrosol = good stuff. I wish I could get some here. Would love to play with it some.

Anyway, enough of that.

How often do you water/feed. Does the media feel dry when you do?

Time to up pot. Root bound / over watered. You really need a bigger pot I would go 9-10 liter 4.5 liter would be minimum.

FYI cal mag doesn't repair the damage already done to the leaves. It only prevent it from spreading to new leaves. So if you fed then and things haven't gotten worse and you see new growth.. It's a good sign.

As per your general plant health, have you been measuring the pH and the ppm of your run off and nutes?


It really help solve problems when you know these 2 factors r in balance otherwise you can have all the essential nutrients available to the plant but bad pH locks it out of use.

not a deficiency, heat or water stress

sir-smoke-alot said:

I've been told this is a few things, Mag def - which i treated with epson salts didn't help much.
I've =ot brown spots fan leaves are dying and new growth is stange and stringy. 4th week of flower running 2*34 watt CFL 6700k and 1*24watt "Warm White" CFL (2000K?) Will post photos below any help would be great. Giving Nitrosol fertilzer every month per package instruction. 1.2 Foot tall plant in 0.5 Liter pot.

Thanks in advance - Stay high

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d666 is right, Your problem is showing through new growth and no where else. Definitely not a deficiency.

ElfoodStampo said:

d666 is right, Your problem is showing through new growth and no where else. Definitely not a deficiency.

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So if it's not a def what is it? Haha my other problem is that all fan leaves and leaves once they get to a certain size are getting brown spots and then going yellow and dying off?

Diabolical666 said:

not a deficiency, heat or water stress

Click to expand...

Would this also explain the brown spots? Thanks a lot for your time- what do you recon I could do to lower temps in a small grow box

tips burnt. over fert.

sir-smoke-alot said:

Would this also explain the brown spots? Thanks a lot for your time- what do you recon I could do to lower temps in a small grow box

Click to expand...

I think the keystone to your problem is overfeeding. It might be the nutes them selves, or you could be throwing the pH by over feeding.
So tell us how much of what your feeding and how often. I