Is this nitrogen deficiency? and how do I add nitrogen???

From what I read this looks like nitrogen...but I don't know how I would add nitrogen?

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I have had similar looking plants in the past... Not sure if it was Nitrogen or a ph issue or nute lock out... Have you got a E.C. meter and ph meter or test kit? Hope someone knowledgeable answers your question as I am curious now... Will prob get a bunch of amateurs telling you all sorts of crap before you get a proper answer lol....

Here's a good site for now and for future reference. http://www.greenmanspage.com/guides/plant_abuse.html
It's not easy to diagnose your problem without more information. What kind of nutes and water are you using and in what amount? Or even better, what are your pH, ppm, and EC?

Your plant definitely needs nitrogen its in your veg nutes. get a PPM meter and check your PPM also get a PH meter you might have a high PH level and locking out essential nutrients like Nitrogen.

If you have your PH and PPM all set then I would say it was Nitrogen because of the light green color of them. Of course if you have excess N they will be dark green.

how do you add more nitrogen without adding more P and K?

hypocritisizer said:

how do you add more nitrogen without adding more P and K?

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Usually you just up your veg nutes, seeing as most veg nutes have high N to P-K ratios.