3rd week of flower and I have a deficiency. Please help (Pix)

M

MedicalMarijuanaUser

Member
I'm just finishing my third week of flower. Some leaves on the plants are turning a purplish color. Not many but I'm still worried. It starts at the tips then works down the leaf. I just flushed last week. My temps have been a bit low but I have fixed that problem. Any advise would help. Is it a deficiency? toxicity? frostbite? Please help.
 

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MedicalMarijuanaUser said:
I'm just finishing my third week of flower. Some leaves on the plants are turning a purplish color. Not many but I'm still worried. It starts at the tips then works down the leaf. I just flushed last week. My temps have been a bit low but I have fixed that problem. Any advise would help. Is it a deficiency? toxicity? frostbite? Please help.
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looks like a P def.....
 
My temps have been a bit low but I have fixed that problem. Any advise would help. Is it a deficiency? toxicity? frostbite? Please help./
Frostbite? Jesus, how cold was your grow room? :) If, in fact, it was really that cold, you may have a minor phosphorus deficiency caused by cold soil/nutrient. When temps are cold the plant tends to lack phosphorus uptake. Warm things up and see how it goes. Aim for no less than 16*C (61*F) during the dark period and no more than 26*C (79*F) during the light period.
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your plant should start to change colors at that point bro. i wouldnt worry at all. i had a couple skunkx haze plants that were completely yellow and purple in the 4th week of flowering...there was no green in it toward the end. those leafs actually look very healthy....can you post pics of the plant? i bet its a healthy awsome plant....those leafs dont scream problem to me man.
just remember the plantrs are going to change color. if you have dark green in yur plants towards the end of flowering then your plant has too much nitro in it and it will affect the taste in the end....flushing is going to bring out all sorts of colors in your plants...
 
when i keep my grow room temps at 75-77 f the plants start to show a lot of purple......those leafs look completely healthy to me....very healthy actually
 
The lowest my temps get are 59 degrees at night and 72 degrees when the light is on.
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That's about what I run, maybe a little warmer by a degree or two, but nothing serious. I may not even be temperature related at all.

Now my leaves are turning yellow. I think I have a N def. now.
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Are you using bloom enhancers? What is your nutrient ratio? Too much P can antagonize the availability of N.
 
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