troubled leaves . . .

[babylon]

i have a plant which is about 5 weeks old now.

most of the lower leaves have all turned yellow over the whole leaf and some higher leaves have started yellowing from the edge and is now gradually working its way over the whole leaf.

they are also drying out a little. the newest leaves seem to be fine so far.

any idea what could be causing this ?

this plant is from bagseed.

pictures....
http://www.weedfarmer.com/pictures/v/babylon/third/


any help appreciated.

cheers

[Lucian]

Hi Babylon,

What kind of soil are you using? Does it have ferts in it? Yellowing by itself usually means it needs Nitrogen. I don't know how much you know about growing so ... Fertalisers have a N-P-K label on them. You want one with the first number higher than the others and you mix it up next time you water them. Hope this helps

[SmknVTEC]

I would be curious to know the answer to Lucian's question about soil and ferts. Also Babylon, do you know the ph of your soil? If you don't have a ph meter, I highly suggest you pick one up for $5.95 and or get some ph test strips. I have a meter and use the hydropinc water tester solution even though I grow in soil, because that way I can test the ph of the run off water as well. I only bring this up because it looks to me like you have more going on than just N deficiency. Finally, what wattage hps is that?

[MynameStitch]

answer as many as these as possible

ARE YOU USING?

SOIL:
What STRAIN are you growing?
What was the establishing technique? (seed or clone?)
What is the age of your plants?
What PHASE (seedling, vegetative or flower) are the plants in?
What Technique are you using? (SOG, SCROG etc)
What size pots are you using? (Include how many subjects to pot)
What substrate/medium are you using? (percentage of perlite, vermiculite...etc?)
What Nutrient's are you using? *Knowing the brand is very helpful*
What is the TDS/EC/PPM of your nutrients used?
What is the pH of the "RUN-OFF"?
What method of pH test was administered?
When was your last water?
When was your last feeding?
What size bulb are you using?
What is the distance to the canopy?
What is your RH Factor? (Relative Humidity)
What is the canopy temperature?
What is the Day/Night Temp? (Include fluctuation range)
What is the current Air Flow? (cfm etc.)
Is the fan blowing directly at plants?
Is the grow substrate constantly wet or moist?
Is your water HARD or SOFT?
Has plant been recently pruned, cloned or pinched?
Have any pest chemicals been used? If so what and when?
Are plant's infected with pest's?


HYDROPONICS:

What STRAIN are you growing?
What was the establishing technique? (Were the seed or clone?)
What is the age of your plants?
What PHASE are the plants in? (seedling, vegetative or flower) are the plants in?
What Technique are you using?
What substrate/medium are you using?(Hydroton, RockWool etc.)
What is the Nutrient temperature?
What Nutrient's are you using?
What is the TDS/EC/PPM you are using?
What is the pH of the "Tank"?
Are you sure your calibration is correct on your equiptment?
When was your last watering?
When was your last feeding change? (ie. grow-bloom-micro-additional)
What size bulb are you using?
What is the distance to the canopy?
What is your RH Factor?
What is the canopy temperature?
What is the Day/Night Temp? (Include flucutaion range)
What is the current Air Flow? (cfm etc.)
Is the fan blowing directly at plants?
Is your water HARD or SOFT?
Has plant been recently pruned, cloned off of or pinched
Have any pest chemicals been used? If so, What and When?
Are plant's infected with pest's

and which pictures are the trouble ones can you post them here?