Yellow Leaves - How to Spot AND Fix a Nitrogen Deficiency

Tips, Tricks

1. that looked like a "she", rather than a "he"
2. what are some natural nitrogen for vegging? i hear u can add soda
3. my leaves are yellow curling down and some have black spots. What could this be?
4. Should I remove the leafs that won't recover ? 
5. Thanks
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6. My plants are 5 weeks into flowering they have a nitrogen def. can i add Fox Farm Nitrogen this late into flowering? my Ph is 6.0 temp is 75=80.
7. horse shit is just as good if not better i use both 
8. Thanks NIKK420
9. @james, Thanks for stopping by man. Adding organic nitrogen during flower won't hurt your plant, especially if it's deficient. But chemical nitrogen would, yes, be a bad idea during flower.
10. Adding nitrogen in flower isn't really a good idea in my personal opinion the plants that are left alone to suck out all of the stored nuteriants in the fan leaves always seem to produce bigger and better quality buds , compared to plants that are keeped really green to the end . Nitrogen in flower to late flower can also cause sex change and just wants to keep the plant in more of a vegative state stretching out and lower thc production . Try and leave one to yellow out in flower compared to a really green plant u will see a difference . It's P&k in flower leave the N out of npk but nice plants u got I very impressed
11. Hi Zach, Bottom leaves that don't get enough sun will yellow and eventually die off. As long as the majority of your leaves are healthy and green, I would not suspect a nitrogen def. I like to prune off the yellow leaves to make room for healthy ones.
12. My bottom leaves are turning yellow and falling off.... Is this a nitrogen def? Or something else?