Yeah, I did a summer long test in my hydroponics system. Growing lettuce, basil and others.
I had started using urine as a fertilizer in the water supply.
I found that the lettuce grew exceptionally well. After a late spring disaster while I was out of town, I had to restart my hydroponics system (the bucket was empty). I stopped using human urine in the system and some of the plants are still living. I planted a whole new sweet of lettuce, corn, basil. And after giving them a good start... they all looked yellow and undernourished.
After 3 months with very little growth, I began to pee in the water supply and saw instantaneous rebounds in all the plants. Now the heads of lettuce are large enough to eat, after about 50 days.
No artifical lighting was used in the grow of these plants.
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