yellow leaves with brown spots

[rottenfork]

can anyone help im 4 weeks into flower all the leaves are dying but the buds look ok , can any one come up with a reason or a cure. this is happening to both my plants but one more so

rottenfork Reviewed by rottenfork on 06-29-2007. yellow leaves with brown spots can anyone help im 4 weeks into flower all the leaves are dying but the buds look ok , can any one come up with a reason or a cure. this is happening to both my plants but one more so:( Rating: 5

[davejohnwright]

Check here Grow Marijuana FAQ, Cannabis cultivation - marijuana growing tips & photos

[stinkyattic]

Severe sulfur deficiency, to start. Those red petioles are not good!
It looks like you have a general micronutrient problem... either your pH is off or you are not feeding enouhg or you are locked out. But I am not seeing signs of toxic salt lockout so I am guessing pH imbalance or simple starvation.
The spotting could be caused by Ca or K def, or (less likely) a fungus, but even a fungus is often a side effect of the plant's immune system being weakened by a lack of potassium.
So flush, check your runoff pH, adjust if necessary, feed with a complete bloom fert.
If I had that problem I would also add a dose of a micro supplement like GH Micro or Algoflash to the next feeding.
Oh! Last thing- if your temps are very high that will certainly intensify the symptoms.

[rottenfork]

THANKS Stinky Attic,
it seems that you were right they were starved i had only been feeding once every 3 waterings,
I uped it to a feed with every watering an within a week the dying of the leaves has stopped.
Much appreciated mate:thumbsup: