HydroLynx
Well-Known Member
(Reposted from advanced marijuana cultivation. So here is where I think I should post nutrient science.)
Found this gem the other day. If you a NPK ratio perfectionist like myself, have fun, just zoom in to read. Been scouring the scientific literature for cannabis nutrient uptake ratios as I am formulating my own nutrient solutions for recycling hydroponic systems. Looked at reverse engineered NPK ratios from fertilizers such as GHE, Canna etc., and generally found contradictions when compared to the scientific literature.
Note how potassium is AS IMPORTANT as nitrogen during vegetative growth for outdoor sunlit plants here. I suspect a higher K : N ratio is needed for indoor situations where photosynthesis is "more difficult" to quote Kenyon.
Note how unimportant phosphorus is for flowering compared to vegetative growth. Although the flowers do take up slightly more P with time (yellow area for P graph), but with that logic nitrogen was also taken up by the flowers.
Note how less magnesium is needed for flowering compared to summer veg growth. Makes me wonder why they add so much to "boom" fertilizers, esp as it will build up in recycling hydroponic systems. The floral parts also take up more with time, but really nothing to write home about when compared to late vegetative growth.
Found this gem the other day. If you a NPK ratio perfectionist like myself, have fun, just zoom in to read. Been scouring the scientific literature for cannabis nutrient uptake ratios as I am formulating my own nutrient solutions for recycling hydroponic systems. Looked at reverse engineered NPK ratios from fertilizers such as GHE, Canna etc., and generally found contradictions when compared to the scientific literature.
Note how potassium is AS IMPORTANT as nitrogen during vegetative growth for outdoor sunlit plants here. I suspect a higher K : N ratio is needed for indoor situations where photosynthesis is "more difficult" to quote Kenyon.
Note how unimportant phosphorus is for flowering compared to vegetative growth. Although the flowers do take up slightly more P with time (yellow area for P graph), but with that logic nitrogen was also taken up by the flowers.
Note how less magnesium is needed for flowering compared to summer veg growth. Makes me wonder why they add so much to "boom" fertilizers, esp as it will build up in recycling hydroponic systems. The floral parts also take up more with time, but really nothing to write home about when compared to late vegetative growth.
