Brown/Rust Colored Spots on Yellowing Leaves, with pic.

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Cramos241

Member
Hey Guys,

Got this interesting brown/rust colored spotting appearing on a few of my lower large fan leaves. These plants are currently in their 3-4 week of vegetative growth. Have been looking at numerous forum posts and referencing a couple books but cant seem to find an example quite similar to mine. Spotting seems to originate from any part of the leaf, edges dont seem to be affected. My PH is at a consistant 6.6 in a soil medium (FF Ocean Forest). My nute mix is minimal, just FF Grow Big and a little molasses at the moment. Temp is 75, humidity unknown. Runnin 1 600w HPS plus a few 80w cfls for filler. Light is a little more than 2 feet from the top of the plants. My first thought was it was nute burn so I just completed a thorough flush and waiting to make my next move till I diagnose properly.

Thanks for the help, hope the pic is sufficient. If not, Ill be gettin access to a better camera shortly to repost pics.
 

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Red Robin

Red Robin

New Member
Red Robin said:
Thats definitely to much Nitrogen.
Click to expand...
Your plant can 'grow out' of nute burn. I would just flush the plant, and use about half the amount of nutes you have been using.
I would cut all the severely yellow leaves off. If you flush, new green leaves will eventually grow.
 
Nice Ol Bud

Nice Ol Bud

Well-Known Member
Dont listen.
Flush your plants,
Dont cut any leaves off.
You also might have it too close to the light..
but its a nute burn.
Where was that leaf located?
Top or Bottom?
 
Red Robin

Red Robin

New Member
Nice Ol Bud said:
Dont listen.
Flush your plants,
Dont cut any leaves off.
You also might have it too close to the light..
but its a nute burn.
Where was that leaf located?
Top or Bottom?
Click to expand...
It clearly says its from the bottom. Mabey you should read his post before you post.
And why would he want to keep dead leaves on his plant?

@Cramos, like he said, dont listen to him
 
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Cramos241

Member
Good lookin on the replies. First off to answer the temp question, I do have a heater located in my growspace that keeps a pretty constant 72-75 degrees. Yallreadykno, just gonna cut any leaves lookin like 50%+ of damage and let the plant do its thing. I figured it was nute burn, I need to invest in a ppm... I'd like to throw out this question as well: Would it be more beneficial to be adding my nutes every other watering cycle? Up until recently, I have been adding them in every time.
 
C

Cramos241

Member
Sorry forgot to mention, I thought a Nitrogen overload would turn the leaves more towards a darker, "forest" green as opposed to a yellowish tint with necrotic spots.
 
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