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I am pretty sure I have a nitrogen deficiency. The bottom leaves are completely yellow. I am two weeks into flower and coincidentally I'm due for a res change tomorrow. Could this be why? My nutes are Botanicare Pure Blend Pro Fruit and Flower 2.5-2-5. Its only appearing in one or two plants as of right now.
If its not just my plants signaling that its time for a res change, what's the best way to add nitrogen without hindering the flowering process?
Can anyone hook me up with some info here? I don't want to add too much nitrogen and slow down the flowering.
I don't think you should be adding N during flower. Makes it taste like crap unless really flushed well.
Yellowing during flower is normal and leaves will die of. Flowers will look great though. i really wouldn't worry about it. Is PH fine? have you over nuted? If ph is ok and nute schedule is good then probably not a problem.
I grow soil though.
My pH has been between 5.7 and 6.0 the entire grow, except for the first week or so after I got my meter and didn't calibrate it! :) The nutrients for my first two weeks of flowering were only 50% strength and the res was a couple days shy of 2 weeks old when the yellowing started which is why I thought maybe they had used up all the nitrogen. I did a res change yesterday (on the 2 week mark) and added full strength nutes since I am entering the 3rd week of flower. My PPM is at 1800, which seems high, but I did a search on Google for average PPM levels and found a couple different sources that says you can have your PPM that high in flower. The Pure Blend Pro jug suggested 675 mL for "Aggressive Fruiting/Flowering" so I added 500 mL. The veins of the yellow leaves look like they are turning green; do they normally turn green again or do they just die out? I'm halfway to the promised land and I don't need things fucking up now!
well as i understand it, during flower the plant pulls nutrients and sugars from its self to feed the flowering process. The plants ultimate goal in life is to flower, produce seeds, then die. So basically what she's doing is pulling resources from somewhere she doesnt need them anymore and putting them towards budding.
Well I never thought of it like that, but it makes perfect sense. Thanks for the reply!
Yes but I have had a strain need more N than others. One sativa had to be harvested prematurely because its leaves were all dead while my trich's were still clear, and the hairs were still 80/20 White/Red. Next harvest I feed one extra veg feeding(30-15-15) after about 1 week of Bloom Nutes(15-30-15)and everything went well.
Dejayou - post some photos!
What Gundari described is something that occurs later in flower but usually not so early. At two weeks into flower, you should be getting towards the end of your growth spurt. Being as you are talking about the lower leaves, they often die off just from lack of light.
How is your upper growth looking - the otherwise healthy leaves? Any spots on the leaves or red in the veins? If you can post some pics, it will help a lot.
How are your clones doing?
PC :smokin:
You may be underfeeding entirely, or you may be locked out by pH. Check runoff pH, and if it's fine, crank up your nutes a bit- carefully- and watch for signs of burn. Ease off if you see any.
But pics would help very much.
I'm pretty confident that its not a pH issue. I monitor it pretty regularly. I tried to get some pictures, but the HPS light makes black lines in my pictures so you can't really tell whats going on. Maybe my cheap Sony camera. I upped the nutes to full strength and changed the res, so we'll see what happens.