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I am about three weeks away from harvesting and have used the maximum nutrient solution for the past 5 weeks. Should I start using less nutrients for the final weeks up until i just use water for 4 to 5 days to flush them?
Wow 2000 PPM, that's some strong solution, I'm amazed your plants didn't burn. To answer your question, yes I would reduce the nutes prior to the flush, specially since your leaves are really dark green.
I agree to athos, The leaves are very Green and it looks like a lot of nitrogen,. plants dont need no more ( or very very less) Nitrogen now. Yout Girlas depend in Phosphorus . And this is very hard to overdose...just skip the nitrogen fertiliser